Persistent Red Bumps on the Skin: Causes and Next Steps - Dermatology

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The persistent red bumps on your left arm that have appeared over the past two weeks, resembling coins and feeling like small nodules without any pain or itching, can be concerning. Given that they have not shown any signs of improvement despite the application of various topical treatments like lotion, erythromycin, and strong moisturizers, it is essential to consider several potential causes and the appropriate next steps.

One possibility is that these bumps could be a form of dermatitis, such as contact dermatitis or a type of eczema. Contact dermatitis occurs when the skin reacts to an irritant or allergen, leading to inflammation and the formation of red bumps. However, since you mentioned that there are no wounds and the bumps are not itchy or painful, this may be less likely.

Another possibility is folliculitis, which is the inflammation of hair follicles. This condition can present as small red bumps and is often caused by bacterial infections, irritation, or blockage of the hair follicles. If the bumps are indeed folliculitis, they may resolve on their own, but persistent cases might require topical or oral antibiotics.

Additionally, conditions such as keratosis pilaris, which is characterized by small, rough bumps on the skin, could also be a factor. This is a common and harmless condition that typically does not require treatment, although it can be managed with moisturizers and exfoliating agents.

Given the duration of the symptoms and the lack of response to over-the-counter treatments, it would be prudent to seek a professional evaluation from a dermatologist. A dermatologist can provide a more accurate diagnosis through a physical examination and, if necessary, additional tests such as a skin biopsy or allergy testing. This is particularly important if the bumps continue to persist or if you notice any changes in their appearance, such as increased redness, swelling, or the development of pain or itching.

In the meantime, it is advisable to avoid any potential irritants, such as harsh soaps or lotions, and to keep the area clean and moisturized. Observing the bumps for any changes over the next week or two is reasonable, but if there is no improvement or if the condition worsens, seeking medical advice sooner would be the best course of action.

In summary, while there are several potential causes for the persistent red bumps on your skin, the best approach is to consult with a healthcare professional for a definitive diagnosis and appropriate treatment. Self-monitoring is important, but professional guidance will ensure that any underlying issues are addressed effectively.