Are dark patches around my mouth a sign of skin disease?

Question

Hello doctor,

I have noticed marks near my mouth that have appeared over the past three to four days. I would like to know the possible cause and whether there is a risk of it spreading.

Please help.

Thank you.

Answer 1

Hello,

Welcome to icliniq.com.

Thank you for reaching out and sharing your concerns so clearly.

I understand that noticing new marks around the mouth can feel worrying, especially when they appear suddenly.

Based on the picture(attachments were removed to protect the patient's identity) and the short history of about three to four days, this looks like patchy pigmentation around the corners of your mouth. Pigmentation simply means darkening or a change in skin color.

There are several possible reasons for this kind of discoloration, and the exact cause usually depends on your daily habits and whether you had any symptoms before the marks appeared.

Common possible causes are

Irritant or contact dermatitis means skin irritation or allergy caused by products touching the skin, such as toothpaste, lip balm, face wash, shaving products, masks, or even frequent lip licking.
Post-inflammatory pigmentation is darkening that remains after the skin was mildly irritated, red, dry, or inflamed.
Lip-licker’s dermatitis means dark patches caused by frequent licking of lips, which damages the skin barrier.
Fixed drug eruption means a dark patch that appears after taking a medicine, commonly painkillers or antibiotics.
Early perioral dermatitis is a mild skin condition causing irritation around the mouth.

Less commonly known causes are:

Lichen planus is a chronic inflammatory skin condition that can cause dark or violaceous patches.
Nutritional deficiencies can cause a lack of certain vitamins, such as B12 or iron.
Frictional melanosis means darkening due to constant rubbing or friction.

Please think about and observe whether you had any of these symptoms before the marks appeared, such as itching (a strong desire to scratch), burning or pain, redness, dryness or scaling (flaky skin), cracking or fissures (small cuts in the skin), or general soreness. These early signs can help in understanding the cause of the skin changes.

Also consider the following:

Did you change toothpaste, face wash, sunscreen, shaving cream, or lip products recently?
Do you use a mask for long hours?
Do you have habits like lip licking, touching the area often, or drooling during sleep?
Did you take any new medicine (painkillers, antibiotics, or supplements) in the last few days?
Do you have similar patches elsewhere, mouth ulcers, or genital lesions?

These details are very important because they help in finding the exact cause.

From the appearance and short duration, this does not look dangerous and is unlikely to spread quickly. In most cases, once the trigger (cause) is removed and the skin heals, the pigmentation stops increasing and slowly fades.

However, conditions like lichen planus or fixed drug eruption can sometimes spread, so they need to be ruled out if symptoms worsen.

For now, focus on repairing and protecting your skin barrier:

Apply a bland moisturiser (emollient) such as petroleum jelly or any sensitive-skin moisturiser gently over the affected area two to three times a day, especially at night, to help repair the skin barrier and reduce further irritation and pigmentation.
Avoid using any harsh or unnecessary products around the mouth, including scrubs, fairness or bleaching creams, steroid creams, and home remedies like lemon, toothpaste, or turmeric, as these can further irritate the skin and worsen pigmentation.
Use a mild, fragrance-free face wash.
Do not rub, scratch, or over-wash the area.
Use SPF 30 (sun protection factor) sunscreen during the day if you go outdoors, as the sun can worsen pigmentation.

Monitor the area over the next seven to ten days, and please contact us if you notice increasing darkness, itching or burning, pain or scaling, spread to other areas, or the appearance of similar patches elsewhere, as these may indicate the need for further evaluation.

Along with that, share the answers to the history questions above for an exact diagnosis.

Overall, at this stage, this looks mild, common, and manageable, and with proper care, it usually improves gradually.

I hope this helps.

Please revert in case of further queries.

Thank you.