Bed Bug Bites: Pictures, Symptoms, Treatment & Prevention

Key points

• Bed bug bites typically lead to raised, itchy bumps in clusters, linear, or zigzag patterns. This rash can disrupt sleep but bed bugs don’t transmit any diseases.
• Bed bugs are small, brownish insects that feed on human blood.
• Signs of bed bug infestation include bite marks, blood stains, droppings, a musty odor, and sightings of bugs or eggs.
• Bed bugs can spread or be transferred through travel and infested items and are found in homes, hotels, and public transport.
• Bed bug control involves cleaning, heat treatment, vacuuming, professional pest control, and preventive measures.

This article is your complete guide to identifying bed bugs and bed bug bites, with pictures included. Learn where and how to check for them, and get to know the symptoms and how to treat bed bug bites.

Table of Contents

• Video Overview
• What are bed bugs?
• Where to find them?
• Their life cycle
• Pictures and appearance of bed bugs
• Causes of bed bugs
• Early signs of bed bugs
• Pictures of infestation
• How to check for them?
• Pictures of bed bug bites
• Symptoms of bed bug bites
• Are bed bugs harmful?
• Differential diagnosis
• Bed bug bites treatment
• Getting rid of bed bugs
• Prevention of infestation
• See a doctor
• FAQs

Video Overview

What are bed bugs?

Bedbugs are small insects that are part of the Cimicidae family. They primarily feed on the blood of humans and animals, mostly during the night. It’s important to note that their presence is not an indication of poor hygiene or housekeeping. Instead, our body heat and the carbon dioxide we exhale attract them, guiding these pests to their food source.

One notable characteristic of bedbugs is their ability to survive for several months without feeding. This trait allows them to persist for extended periods, even when there are no apparent bug bites.

Their reproductive capacity is also a significant concern. A female bedbug can lay hundreds of eggs throughout her lifespan. These eggs hatch into nymphs which mature into adults.

Bedbugs differ from ticks in that they do not remain attached to their host post-feeding. 

Can you see bed bugs?

Yes, bedbugs are indeed visible to the naked eye. Although small, they are noticeable, particularly when they reach adulthood.

Where can you find them?

Bedbugs are adept at concealing themselves and can squeeze into spaces as narrow as the width of a credit card. Their flat bodies enable them to move and hide with ease, often going unnoticed.

Bedbugs are not specifically attracted to dirty environments. They prefer to reside close to their hosts, from whom they periodically feed on blood to support their growth and reproduction.

While they are named ‘bed bugs’, this doesn’t mean they are exclusively found on beds. They can be located in various nooks and crannies throughout a dwelling. Common hiding spots include:

• Mattress seams
• Box springs
• Bed frames
• Behind electrical switchboards
• Behind headboards
• Within upholstery
• In the seams or folds of curtains
• Under loose carpets
• Behind wallpaper
• Behind peeling paint
• Objects near the bed
• Buttons or seams of blankets and comforters
• Seams or between cushions of sofas, chairs, or beds
• Handles or edges of drawers
• In shared spaces of apartment buildings

Bed bugs can be found in a variety of places, not just in homes. They are known to infest apartments, hotels, motels, shelters, dorm rooms, nursing homes, hospitals, and even public transportation like buses and trains. Their ability to hitchhike on luggage, furniture, and other items allows them to spread easily to these diverse environments.

Their life cycle

The life cycle of a bed bug begins with an egg. Female bed bugs can lay between one and three eggs each day, potentially laying up to 500 eggs over their lifetime.

These eggs hatch into nymphs, or immature bed bugs, in approximately two weeks. The nymphs then go through five stages of molting to become adults, requiring a blood meal at each stage to progress. In optimal conditions, a nymph can mature into an adult in about a month.

Adult bed bugs also require a blood meal to mate. An interesting aspect of their mating process is traumatic insemination, where the male releases sperm into the female’s abdominal cavity by puncturing her body wall.

How long do bed bugs last? 

The lifespan of a bed bug can vary significantly, ranging from several months up to a year. This variation largely depends on several factors including environmental conditions, the availability of food, temperature, and other elements. 

What do bedbugs look like?

The appearance of bed bugs varies depending on their developmental stage (as depicted in the picture above). Here’s a breakdown of their features at each stage:

Eggs

Bedbug eggs are tiny, about 1mm in size, and appear as white oval structures. They can be found singly or in clusters, often located in corners or crevices.

Nymphs

Nymphs, or juvenile bedbugs, are smaller than adults and are lighter in color, such as whitish or yellowish, which makes them harder to spot. As they mature through five molting stages, shedding their exoskeleton each time, they progressively darken in color. They become more visible after a blood meal due to the blood’s color.

Adults

Adult bedbugs are about the size of an apple seed, measuring approximately 5 to 6 millimeters in length. They have a flattened body, enabling them to hide in small spaces. Their color varies from light brown to reddish-brown, depending on their last feeding time.

Post-feeding, bedbugs appear engorged with blood, displaying a redder coloration. Their body also becomes slightly swollen and elongated.

Additionally, bedbugs are equipped with a beak-like structure called a proboscis, which they use for feeding.

Cause of infestation

The primary cause of a bedbug infestation is their transfer from an infested area to a non-infested one. This transfer can happen in several ways, and it’s important to remember that while bedbugs cannot fly, they can crawl quickly.

Here are some common methods via which you can get bed bugs in your house

• Travel: When traveling, bedbugs can hitch a ride in luggage, clothing, and personal belongings. This is common in places like hotels, airplanes, and other public transportation where bedbugs can be present.
• Purchased items: Acquiring second-hand furniture, particularly beds and couches, is a common way bedbugs find their way into new environments. These items may already be infested with bedbugs from their previous location.
• Neighboring infestations: In multi-unit buildings like apartments and condos, bedbugs can migrate between units. They crawl through small spaces, cracks, and even ventilation systems to spread from one unit to another.
• Visitors: Guests visiting your home can inadvertently bring bedbugs with them. These pests can latch onto clothing, bags, and other belongings, unknowingly transporting them from an infested area to your home.

Early signs of bedbugs

Identifying a bedbug infestation early is crucial for effective control. Here are the signs to look out for:

• Bite marks: Bedbug bites typically present as small, red, itchy bumps. They often appear in a line or cluster, mainly on body areas exposed during sleep, such as the arms, neck, and face.
• Blood stains: Small blood spots on your sheets or pillowcases can be a telltale sign. These stains usually occur when bedbugs are accidentally crushed while feeding or shortly afterward.
• Droppings: Keep an eye out for tiny, dark, almost black spots about the size of a pinhead on bedding, mattresses, and nearby furniture. These spots are bedbug excrement.
• Musty odor: In cases of severe infestation, a strong, unpleasant, musty odor may be present. This odor is produced by glands on the lower side of the bedbug’s body.
• Exoskeletons: As bedbugs mature, they shed their outer shell. You might find these molted skins in or around mattresses, couches, or other areas where they hide.
• Eggs: Bedbug eggs are small, white oval structures often found in the cracks and crevices of your home.
• Live insects: Sometimes, you might find live bedbugs, particularly in the seams of mattresses, cushions, and other similar places.

Pictures of infestation

The pictures below show bed bug eggs, nymphs, and bed bug droppings in the seams.

The picture below shows bed bugs and their droppings on the wall, as well as behind and inside the electrical socket.

The picture below shows a heavy infestation of bed bugs.

How to check for bed bugs

To effectively check for bedbugs, thoroughly inspecting potential infestation areas is important. Additionally, knowing what bedbugs look like will aid in their identification.

• Tools
  • Use a flashlight to illuminate hidden areas where bedbugs might reside.
  • A magnifying glass can help in spotting bedbugs and their signs more easily.
  • Bedbug interceptors, placed under the legs of beds, can catch and monitor bedbugs.
• Inspect the bed
  • Remove all bedding and examine it for signs of bedbugs.
  • Pay close attention to the seams and folds of the mattress.
  • Lift the mattress and inspect the underside for live bugs or blood spots.
• Examine the bed frame and headboard
  • Focus on cracks, crevices, and joints in the bed frame and headboard, as these are common hiding spots.
• Check other furniture
  • Inspect sofas, chairs, and other upholstered furniture, especially if they are used for sleeping.
• Look beyond the bed
  • Examine curtains, electrical outlets, behind picture frames, and any cracks in walls or flooring for signs of bedbugs.
• Check bedsheets and comforters
  • Look over your sheets, blankets, and the sides or corners of comforters.
  • If using a comforter cover, be sure to open it and check inside as well.

Pictures of bed bug bites

Symptoms of bed bug bites

Bed bugs generally bite during the late night hours, typically between midnight and 3-4 am. They possess a beak-like or tube-like structure for drawing blood. Often, they may probe the skin multiple times to find an appropriate blood vessel for feeding, which explains why multiple bites are frequently observed. Typically, they feed for 5-10 minutes.

Bed bug bites often don’t appear immediately when the bug bites, and you may not even feel the biting. Symptoms can take a few minutes to several days to manifest. Some people may not react to bedbug bites at all, while others might develop severe itching, welts, or allergic reactions.

Where do the bed bugs bite?

Bed bug bites typically occur on body parts that are exposed during the night, such as the face, arms, hands, fingers, legs, feet, back, and neck.

Appearance

The rash from bed bug bites may present with the following features:

• Flat or raised spots, which may be aligned in a line, zigzag pattern, or grouped in a cluster.
• Spots with dark red centers.
• On light skin tones, bed bug bites often appear dark pink or red, while on dark skin tones or black skin, they may look reddish-brown or purple, which can make them more challenging to detect.
• In some cases, hives or fluid-filled bumps (blisters) can develop.

It’s important to note that individual reactions to bed bug bites can vary significantly, leading to differences in symptoms from one person to another.

Associated symptoms

• Bed bug bites are often itchy, which can disrupt sleep and daily activities.
• Bites can cause mild discomfort, burning sensation, and irritation.
• If scratched frequently, there’s a risk of the bites becoming infected.

Severe symptoms

Rarely, some people may experience severe allergic reactions or anaphylaxis to bed bug bites, necessitating immediate medical attention. These reactions can include:

• Nausea and vomiting
• Difficulty in breathing
• Appearance of multiple welts
• Swelling of the airways
• Wheezing
• Dizziness
• Confusion

Are bedbugs harmful to health?

While bedbugs are not known to transmit diseases, they can impact daily life, and sleep quality, and cause severe reactions in some individuals.

• Allergic reactions: Some people may have severe allergic reactions to bedbug bites, resulting in intense itching, swelling, and, in rare cases, anaphylaxis.
• Skin infections: Scratching bedbug bites can lead to skin infections such as impetigo, ecthyma, and lymphangitis.
• Sleep disturbances: The presence of bedbugs can lead to anxiety and insomnia. The stress of dealing with an infestation can also have psychological effects.

Differentiating from other bites and rashes

Bedbug bites are often mistaken for mosquito or flea bites, as well as other rashes like hives. Below are the differentiating features:

• Unlike mosquito bites, which typically appear as single spots, bedbug bites often present in groups. 
• Flea bites are commonly concentrated around the ankles and lower legs, while bedbug bites can occur on any exposed body part during sleep.
• Scabies is a condition caused by mites that burrow into the skin, leading to itchy red bumps or blisters. These are often found in body folds, such as between fingers and toes.
• Spider bites are usually a single spot and are often harmless. However, bites from certain poisonous spiders can cause severe symptoms like headaches, muscle pain, and difficulty breathing, requiring immediate medical attention.
• Hives can appear red, skin-colored, or darker than the skin. They typically disappear within a day and often have irregular borders, with multiple spots merging to form larger areas.

How are bed bug bites treated?

Most bed bug bites typically resolve within a week, though it may take longer for some individuals. If the symptoms of bed bug bites are mild, they can generally be managed with over-the-counter remedies:

• Clean the area: Wash the affected area with mild soap and water.
• Antihistamines: These medications can help relieve itching and diminish allergic reactions.
• Topical steroids: Mild topical steroid creams or ointments, such as hydrocortisone 1%, can be applied to control itching and inflammation.

For more severe symptoms, it is advisable to consult a doctor. In such cases, they may recommend:

• Prescription medications, such as stronger antihistamines or topical steroids, to more effectively manage the symptoms.
• Antibiotics: If there is a secondary infection resulting from excessive scratching, your doctor may prescribe antibiotics to treat the infection.

How to get rid of bedbugs?

To effectively eliminate bed bugs, using multiple methods is often more successful than relying on a single approach. However, it’s important to note that treating a bed bug infestation can be challenging, and seeking professional help is usually recommended. 

Here are some measures that can aid in getting rid of bed bugs:

1. Vacuuming

Regularly vacuum floors, furniture, and mattress seams. Use a stiff brush to loosen bed bugs and their eggs from the seams or corners of mattresses, sofas, and carpets. After vacuuming, immediately empty the contents into a sealed bag and dispose of it in an outside trash can.

2. Steam cleaning

High temperatures (at least 130°F as per US Environmental Protection Agency (EPA)) can kill bed bugs, making steam cleaning an effective method for treating mattresses and other upholstered furniture.

3. Laundering

Wash bedding, clothing, and other washable items in high temperatures and use a hot dryer setting for at least 30 minutes.

4. Treating infested items

To treat items infested with bed bugs that cannot be washed, start by sealing them in a bag. This step is crucial to contain the bugs and prevent their spread. 

• For heat treatment, these sealed items can either be placed outside in direct sunlight or in a car with the windows rolled up, where the heat can effectively eliminate the bed bugs. Ensure they are exposed to this heat for a sufficient amount of time, at least 24 hours. 
• Alternatively, for cold treatment, the sealed items can be placed in a freezer set to 0°F (-18°C), make sure to use a thermometer to check the temperature. They should be kept in the freezer for at least FOUR days to ensure the bed bugs are eradicated.

5. Encasements

Use special covers for mattresses and pillows to trap bed bugs and prevent further infestation. Since bed bugs can survive for a long time without a meal, these covers should not be removed for at least a year. Regularly inspect them for any holes or damage.

6. Pesticides

When dealing with bed bugs, pesticides can be a useful tool, but it’s crucial to use products that are approved by the Environmental Protection Agency (EPA) and specifically designed for bed bug control. Always follow the safety precautions outlined on the label of any product you use. Some commonly used pesticides for bed bug control include:

• Pyrethrins and Pyrethroids: These act as neurotoxins, affecting the nervous system of the bed bugs.
• Desiccants: Products like diatomaceous earth work by destroying the outer coating of the bed bug, causing dehydration and death. Use only desiccants labeled for bed bug control and registered with the EPA. Avoid using food-grade desiccants or those meant for other purposes, as they can be hazardous when inhaled. Follow all label precautions when using desiccants.
• Pyrroles, Neonicotinoids, and Insect Growth Regulators: These are other classes of chemicals that can be effective against bed bugs, each working in different ways to control or eliminate the infestation.

It’s important to note that bed bugs may develop resistance to certain chemicals, so if the infestation doesn’t improve, consider using alternative methods.

7. Personal protection

When treating bed bugs, wear full-length clothes to minimize the risk of bites. Also, if have small kids or pets at home, make sure to keep them away from any areas treated with chemicals.

8. Bed bug interceptors

Placing these under the legs of your furniture can trap bed bugs and also help assess the effectiveness of your treatment plan.

9. Professional help

Completely eradicating bed bugs can be challenging, so hiring a pest control professional who specializes in bed bug removal is often the best course of action.

10. Discarding infested items

You don’t need to necessarily discard infested items. However, if you decide to discard heavily infested items, ensure they are collected by a waste collection agency or marked to prevent others from using them and inadvertently spreading the infestation.

How to prevent infestation

To prevent future bed bug infestations, it’s essential to follow certain precautionary measures:

1. Vacuum regularly: Regularly vacuum your home, paying special attention to all corners, under carpets, and the cushions of sofas. This helps remove any bed bugs or eggs that may be present.
2. Inspect second-hand furniture: Be cautious with used furniture. If you purchase second-hand items, thoroughly inspect them for signs of bed bugs before bringing them into your home.
3. Use protective covers: Encase mattresses and box springs with bed bug-proof covers. Replace them if you find any holes or tears.
4. Reduce clutter: Minimize clutter in your living spaces, especially bedrooms, to reduce potential hiding spots for bed bugs.
5. Travel precautions: When traveling, take steps to prevent bringing bed bugs back home:
   • Inspect hotel room mattresses, especially corners and seams, and behind headboards for signs of bed bugs.
   • Avoid placing luggage on the bed; use a luggage rack, or keep bags in the bathroom or tub.
   • Store dirty clothes in a separate bag or hang them up, avoiding floor contact.
   • If you notice signs of bed bugs in a hotel room, inform the staff immediately.
   • Upon returning home, wash all clothes in hot water and dry on high heat for at least 30 minutes.
6. Barriers on doors: Install barriers on your doors to prevent bed bugs from entering your home from neighboring units.
7. Seal cracks and crevices: Inspect your home for any cracks, crevices, or loose paint and repair these areas to limit potential hiding spots for bed bugs.
8. Shared laundry precautions: If using shared laundry facilities, transport your dirty clothes in a sealed bag and bring a separate clean bag for carrying laundered items. Avoid folding laundry in public areas, instead bring them to your house and then fold.
9. Regular inspections: Conduct regular inspections of your home for signs of bed bugs to catch any infestations early.

When to see a doctor

If you experience any of the following signs and symptoms after bed bug bites, it’s important to seek medical attention:

• Severe allergic reactions: If you experience intense itching, swelling, or difficulty breathing following bed bug bites, this could indicate a severe allergic reaction. Immediate medical care is essential in such cases.
• Infection: If the bite sites show signs of infection, such as fever, increased swelling, redness, or pain, particularly as a result of scratching the bites, you should consult a healthcare professional.
• Impact on daily life: The presence of bedbugs can sometimes cause significant psychological distress, including anxiety or sleep disturbances. If you find that the situation is impacting your daily life or mental health, seeking medical advice or counseling can be beneficial.

FAQs

• Can bedbugs transmit diseases?
  • Currently, there is no scientific evidence to suggest that bedbugs transmit diseases to humans.
• Do bedbug bites hurt?
  • Bedbug bites are typically not felt when they occur. The discomfort, itching, and irritation usually start after the bite, with the degree of discomfort varying depending on an individual’s sensitivity.
• Can bedbugs jump or fly?
  • No, bedbugs cannot jump or fly. They move by crawling.
• How do I know if my bites are from bedbugs?
  • Bedbug bites often appear as small, red, itchy spots, usually in a line or grouped. However, confirming bedbug bites typically involves finding physical signs of bedbugs in your environment.
• Can bedbugs be eliminated with home remedies?
  • Home remedies, such as essential oils or baking soda, are largely ineffective against bedbugs. The most effective approach usually involves a combination of thorough cleaning, high-heat laundering, and professional-grade pesticides.
• Can I get bedbugs from public transportation?
  • While it’s possible to pick up bedbugs from public transportation, it’s less common compared to places like hotels or used furniture. It’s always prudent to check your belongings after traveling.
• How quickly can a bedbug infestation spread?
  • A single female bedbug can lay hundreds of eggs over her lifetime, allowing infestations to grow quickly if not promptly addressed. Infestations can spread to different rooms and even to neighboring units in multi-unit buildings.

Takeaway

A cluster of bites on your arms or legs may suggest bed bug bites, but this is not always the case. If you are unsure, it’s advisable to examine your sleeping area for bed bug signs. Inspect your bed, mattress, and other small nooks for signs like eggs, droppings, or bloodstains.

Prompt action is essential to prevent the spread of an infestation. Sometimes, basic cleaning methods may help manage the situation. However, in cases of a significant infestation, it is important to seek professional pest control services to tackle the issue effectively.

While most bed bug bites heal on their own, if you notice severe itching, signs of infection, or other unusual symptoms, consulting a doctor is important.

References

• Bed Bugs Appearance and Life Cycle. U.S. Environmental Protection Agency.
• Pesticides to Control Bed Bugs. U.S. Environmental Protection Agency.
• Bed Bugs. PestWorld.org.
• Bed bugs: Overview.  American Academy of Dermatology Association.
• Bed bugs. CDC.
• Doggett SL, Dwyer DE, Peñas PF, Russell RC. Bed bugs: clinical relevance and control options. Clin Microbiol Rev. 2012 Jan;25(1):164-92. doi: 10.1128/CMR.05015-11. PMID: 22232375; PMCID: PMC3255965.

Disclaimer: This article is for information purposes only and does not replace medical advice.

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