Cold sores usually appear on and around the lips, whereas pimples can occur on the lip line or elsewhere on the face, but not directly on the lips.
Cold sores (or oral herpes) appear as clusters of painful, fluid-filled bumps that may itch, tingle, or burn. In contrast, pimples may appear as a whitehead, blackhead, pus-filled bump, or red bump. They typically do not burn or tingle, although they may hurt.
Additionally, cold sores are a contagious viral infection, while pimples are not contagious. The treatment for these two conditions is also entirely different; acne is often treated with medications like benzoyl peroxide, while cold sores are treated with antivirals.
This article includes detailed information on the differences between cold sores and pimples, pictures that show what cold sores and pimples look like, their causes, treatments, and more.
At some point, many of us may experience the unpleasant surprise of a red bump or spot appearing on or near our lips. Cold sores are one of the common causes of bumps on and near the lips.
If you are wondering, “Can you get a pimple on the lip?” the answer is that pimples do not occur directly on the lip, but they can occur on the lip line.
Both cold sores and lip pimples can look similar, especially in the early stages of cold sores. In addition, although less common, cold sores can appear in other places on the face, making it important to distinguish cold sores from acne pimples or zits.
Table of Contents
Identification
The location and appearance of cold sores and pimples can help in identifying them.
1. Location
Cold sores (also known as fever blisters, oral herpes, and herpes labialis) are usually located on and around the lips or mouth, occasionally under the nose, on the chin, cheeks, nose, or near the eyes. In addition, the first outbreak of cold sores or primary herpes infection can lead to blisters inside the lips or mouth.
In contrast, pimples or acne can appear anywhere on the face; however, they are very commonly seen on the oily areas of the face, including the cheeks, forehead, nose, and chin. A lip pimple is usually present on the lip line or lip border, unlike cold sores which may be present directly on the lips.
Although their location is helpful in most situations, there are some locations where it becomes hard to distinguish them, especially on the lip border, corner of the mouth, under the nose, above the lip, or on Cupid’s bow.
2. Appearance
Another essential feature that can help differentiate cold sores and pimples is their appearance.
Cold sores appear as red, fluid-filled bumps, often in clusters, while lip line pimples or zits are usually single and may appear as a whitehead, blackhead, or red bump. It is uncommon to see them clustered on the lip line.
In addition, understanding how these skin conditions progress can help in differentiating them.
Features of cold sores:
- Cold sores begin with a sensation of itching, tingling, and burning: This phase is termed the early stage of a cold sore. In some cases, one may see slight redness or swelling, but blisters are not seen in the early stage.
- Cold sore bumps form blisters: A day or two after the initial symptoms, painful red, fluid-filled blisters, often clustered together, appear. These bumps are often filled with clear fluid, although sometimes the fluid can appear cloudy.
- Cold sore blisters form ulcers: Unlike a pimple, the blisters of cold sores burst, leading to weeping or oozing of fluid and forming ulcers.
- Cold sores scab as they heal: Following the ulcer phase, the cold sores form a scab or crust which eventually falls off.
- Duration of cold sores: Cold sores usually last for 1-2 weeks.
- Additional symptoms: If this is the first or primary herpes infection, one may also have additional symptoms such as fever, sore throat, sores in the mouth, muscle ache, or weakness.
Features of pimples:
- Do not appear as clusters: Pimples usually appear as a simple red spot, whitehead, blackhead, or pus-filled bump.
- Can be further described in detail depending on the type of acne:
- Whitehead: A white or skin-colored bump.
- Blackhead: A bump with a black center.
- Papule: A raised red bump.
- Pustule: A raised bump filled with pus and with a red rim around it.
- Nodule: A deeper red bump, hard to the touch, which may be tender.
- Cyst: A deeper bump filled with pus, soft and often painful.
- Do not occur directly on or inside the lips: Unlike cold sores or herpes, pimples do not occur directly on the lips or inside the lips.
- Do not tingle or burn: Pimples generally do not have a tingling or burning sensation before appearing. They may hurt, especially when present on the lip line, although the pain is usually more intense with cold sores.
- Duration varies: Pimples often resolve in a few days to a week.
3. Scarring
Cold sores usually do not leave behind any scars while pimples, particularly those that are nodular or cystic, may result in acne scars such as ice pick, rolling, or hypertrophic scars.
Pictures
The picture below shows the comparison of a pimple (acne pustule) on the lower lip line and a cluster of cold sores or herpes blisters along the lower lip.
What do pimples look like?
Below, you will find pictures of the lip line pimples, along with pimples on the face.
What do cold sores look like?
Below, you will find pictures of what cold sores look like in different phases and at different locations on the face.
The picture below shows a cluster of cold sores on the upper lip and lip line.
The picture below shows cold sores along the lower lip in the ulcer stage.
The picture below shows cold sores on the side of the mouth in the scabbing stage.
The picture below shows cold sores at the corner of the mouth, with a yellow crust.
The picture below shows cold sores under the nose in the crusting stage.
Causes
A pimple does not turn into a cold sore, as both of these are two separate skin conditions and occur due to entirely different causes.
Cold sores
Cold sores are a contagious viral infection caused by the herpes simplex virus (HSV). There are two types of HSV: HSV-1, which primarily affects the mouth, and HSV-2, which mainly affects the genitals. Both types can affect either area.
Once infected with HSV, the virus remains dormant in the body and can reactivate, causing cold sores multiple times throughout a person’s life.
An outbreak of cold sores can be triggered by several factors which include:
- Stress
- Illness (such as the flu or cold)
- Fever
- Changes in hormones or menstruation
- Sun exposure
- Skin injury
- Certain foods
- Extremes of temperature
- Fatigue
- Lack of sleep
- Suppressed immune system
Pimples
Pimples are commonly seen in teenagers and young adults, although they may occur in any age group. Pimples result from clogged hair follicles, which can be blocked by excess oil or dead skin cells. This can lead to non-inflammatory acne, consisting of whiteheads or blackheads.
If the blocked hair follicles become inflamed or infected (due to Cutibacterium acnes proliferation), they can give rise to inflammatory acne lesions, including papules, pustules, nodules, and cysts.
Additional factors that can trigger acne include:
- Certain cosmetic products
- Irritation from scarves or face masks
- High glycemic foods
- Stress
- Hormonal changes such as during menstruation, pregnancy, or menopause
- Smoking
- Certain medications
Complications
Both cold sores and pimples can lead to complications. However, cold sores can lead to severe complications, especially in people with suppressed immune systems.
Complications of cold sores
- Secondary bacterial infections: Open sores may become infected with bacteria.
- Spreading to other parts of the body: Touching a cold sore and then touching other parts of the body, such as the eyes, can spread the virus.
- Herpetic whitlow: This is an infection caused by the virus spreading to the fingertips.
- Herpetic keratitis: HSV infection of the eye may lead to blindness if left untreated.
- Herpetic encephalitis: Herpes simplex virus can lead to brain inflammation, which is serious and can be fatal.
- Eczema herpeticum: This condition involves widespread lesions due to the spread of the herpes simplex virus. It is seen in individuals with a compromised skin barrier such as eczema.
- Complications in immunocompromised individuals: People with weakened immune systems may experience severe and widespread outbreaks.
Complications of acne
- Scarring: Deep or large pimples can lead to permanent scars like ice pick, rolling, or hypertrophic scars.
- Hyperpigmentation: After acne heals, it can leave dark spots on the skin, known as post-inflammatory hyperpigmentation.
- Emotional distress: Chronic acne may lead to self-esteem issues, depression, or anxiety.
- Infection: If improperly handled or picked at, pimples can become infected, leading to further inflammation and discomfort.
Diagnosis
In most cases, cold sores and pimples can be diagnosed based on their location and the appearance of skin lesions. In some instances, your doctor may take a sample from the fluid of cold sores to test for the herpes simplex virus.
Treatment
The treatment of herpes and pimples is entirely different. Treating cold sores with anti-acne medications can irritate the skin and delay healing.
For both cold sores and acne, one should avoid popping them, as this can lead to scarring. Additionally, popping cold sores may spread the herpes virus to other areas of the face or body.
Cold sores
Cold sores may resolve on their own in one to two weeks in a healthy individual. However, there are several treatment options that may help reduce discomfort and pain or speed up the healing process.
- Lip balms containing analgesics like benzocaine and lidocaine can reduce discomfort and pain, but they do not speed up the healing of cold sores.
- Over-the-counter medication like Abreva, containing an antiviral called docosanol, can aid in faster healing of cold sores.
- Antiviral creams (such as acyclovir or penciclovir) can reduce the duration and severity of cold sores.
- Oral antiviral medications, such as acyclovir, famciclovir, and valacyclovir, can be prescribed for frequent or severe outbreaks of cold sores.
- Antiviral medications are crucial for individuals with a suppressed immune system as they can reduce the severity of an outbreak and prevent potential complications.
Additionally, one should see a doctor if:
- Cold sores do not go away in two weeks.
- If cold sores are present near the eyes.
- Cold sores are extensive and very painful.
- One has a suppressed immune system due to an underlying medical condition or immunosuppressive medications.
- One has a history of eczema.
Precautions to follow if you have an active outbreak of cold sores:
- Do not kiss anyone on the face, including the lips.
- Avoid oral sex as the virus can lead to genital herpes.
- Do not come in direct contact with small babies, pregnant women, immunocompromised individuals, or those with a history of eczema.
- Do not share personal items like brushes, utensils, etc., with others.
- Do not touch your sores to prevent the spread of the herpes virus to other parts of the body.
Pimples
The treatment of pimples will depend on their type and severity.
- Non-inflammatory acne, consisting of whiteheads and blackheads, is usually treated with salicylic acid and retinoids like retinol, tretinoin, or adapalene.
- Pustules and papules, which are red bumps, are usually treated with benzoyl peroxide, topical antibiotics, retinoids, and, in some cases, oral antibiotics. Hormonal therapy may be recommended in some instances.
- Nodular and cystic acne usually do not improve with over-the-counter options and a doctor’s consultation is advised to avoid permanent scarring. These may be treated with topical antibiotics, retinoids, oral antibiotics, and, in some cases, oral isotretinoin (a Vitamin A derivative).
Comparison chart
The chart below summarizes the main differences between pimples and cold sores.
| Cold sores | Pimples |
|---|---|
| Cold sores can appear directly on the lip and on the lip line. | Pimples can appear on the lip line but not directly on the lips. |
| Cold sores tend to form clusters. | Pimples are usually present as a single red spot, blackhead, or whitehead. |
| Cold sores are associated with tingling, burning, and itching, and are often very painful. | Pimples can be painful but do not tingle or burn. |
| Cold sores can burst to form ulcers and then undergo scabbing. | Pimples do not pass through the ulcer phase. Also, pimples usually do not scab unless one picks at them and they bleed. |
| Cold sores are contagious. | Pimples are not contagious. |
| Cold sores are caused by the herpes simplex virus, mainly type 1. | Pimples occur due to the blocking of hair follicles by oils or dead skin cells, inflammation, or bacterial proliferation. |
| Cold sores usually do not leave scars but can lead to serious complications in individuals with suppressed immune systems. | Pimples, especially nodular or cystic acne, may lead to scarring. |
| Cold sores may be treated with antivirals. | Pimples are treated with benzoyl peroxide, antibiotics, or retinoids. |
Prevention
Prevention of cold sores
- Avoid close contact (like kissing) with individuals with visible cold sores.
- Avoid sharing personal items such as lip balms, lipsticks, and brushes.
- Use sunblock or lip balm with SPF, as sunburn can trigger an outbreak.
- Wash your hands frequently to avoid getting sick.
- Get plenty of rest and a good night’s sleep.
- Manage your stress.
Prevention of pimples
- Always remove makeup at the end of the day.
- Avoid skincare products that are too occlusive.
- Do not pop existing acne pimples.
- Keep your bed linens and pillow covers clean.
- Clean your phone regularly, as it comes in contact with your face.
- Keep your hair off your face.
- Use products, including face washes, based on benzoyl peroxide and salicylic acid to unclog your pores.
- Include a retinoid in your routine to regulate skin cell turnover.
- Protect your skin from the sun by using sunscreen.
Key points
A cluster of pimples directly on the lips may not be actually pimples or acne but, in fact, cold sores or oral herpes.
Both cold sores and pimples can appear on the lip line, around the mouth, or above the upper lip, making one wonder which it is. However, cold sores and pimples have unique features.
Cold sores can be seen directly on the lips, forming a cluster of red fluid-filled bumps, while pimples appear on the lip line and usually appear as a single red bump, whitehead, or blackhead.
Cold sores are contagious and can be treated with antiviral medications, while pimples are not contagious and can be treated with exfoliants like salicylic acid, retinoids, benzoyl peroxide, topical antibiotics, and in some cases, oral medications.
References
- Saleh D, Yarrarapu SNS, Sharma S. Herpes Simplex Type 1. [Updated 2022 Aug 29]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023 Jan.
- Ayer J, Burrows N. Acne: more than skin deep. Postgrad Med J. 2006 Aug;82(970):500-6. doi: 10.1136/pgmj.2006.045377. PMID: 16891439; PMCID: PMC2585707.
Disclaimer: This article is for information purposes only and does not replace medical advice.