White Bumps on Skin: Causes and Treatments Explained

Skin abnormalities

Hello, doctor.
I have noticed small, potato-sized white spots appearing under my skin.
They are painless and more prominent on my arms, wrists, and back, especially after consuming betel nut or when my skin gets warm.
Although my skin tends to redden when heated, the white spots are distinctly separate from the red areas, not densely packed, but scattered like stars, and they are round in shape.
What could this condition be? There is no pain or discomfort at all.

Niming, 20~29 year old female. Ask Date: 2016/01/27

Dr. Wu Yuxin reply Dermatology

Without actually seeing the lesion, it cannot be confirmed.
If there are any concerns, it is recommended to seek medical attention as soon as possible.

Reply Date: 2016/01/27

More Info

The appearance of white bumps on the skin, particularly when they are small, round, and painless, can be attributed to several potential causes. Based on your description, these bumps seem to be more pronounced after consuming certain foods, such as betel nut, or when your skin becomes warm. This suggests that they may be related to a skin condition that is influenced by heat or irritation.

One common condition that could explain your symptoms is keratosis pilaris, which is characterized by small, rough bumps that often appear on the arms, thighs, and back. These bumps are caused by the buildup of keratin, a protein found in the skin, which can block hair follicles. Keratosis pilaris is generally harmless and often improves with moisturizing treatments and exfoliation.

Another possibility is pityriasis alba, a common skin condition that results in lighter patches on the skin, often seen in children and young adults. It typically appears as pale, scaly patches that can be more noticeable on darker skin. This condition is usually benign and tends to resolve on its own over time.

Given that you mentioned the bumps become more noticeable after eating betel nut or when your skin is heated, it could also indicate a reaction to certain foods or environmental factors. Betel nut, in particular, can cause various skin reactions in some individuals, leading to localized irritation or changes in pigmentation.

Regarding treatment, if the bumps are not causing discomfort or other symptoms, they may not require any specific intervention. However, maintaining a good skincare routine can help manage the appearance of these bumps. This includes:
1. Moisturizing Regularly: Using a gentle, non-comedogenic moisturizer can help keep the skin hydrated and reduce the rough texture associated with conditions like keratosis pilaris.

2. Exfoliation: Incorporating mild exfoliating products containing alpha-hydroxy acids (AHAs) or beta-hydroxy acids (BHAs) can help remove dead skin cells and prevent the buildup that leads to bumps.

3. Sun Protection: Applying sunscreen daily can help protect your skin from UV damage and prevent any discoloration from worsening.

4. Avoiding Irritants: If you notice that certain foods or activities exacerbate your skin condition, it may be beneficial to avoid those triggers.

If the bumps change in appearance, become painful, or if you develop additional symptoms, it is advisable to consult a dermatologist for a thorough evaluation. They can provide a definitive diagnosis and recommend appropriate treatments tailored to your specific condition.

In summary, while the white bumps you are experiencing may be benign and related to common skin conditions, monitoring their progression and maintaining a good skincare routine can help manage their appearance. If you have concerns or if the condition worsens, seeking professional medical advice is always a prudent step.

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