Brief Answer: needs evaluation. Detailed Answer: Hello, Thanks for trusting us with your health concern. From your description the most possible causes in my opinion are- 1. Erythema multiforme. 2. Dermatitis- due to skin infection, allergy,etc. 3. Dry skin- Xerosis. 4. Heat rash pityriasis versicolor A direct examination by a dermatologist is the best way to get it diagnosed. Most simple rashes improve with gentle skin care and avoiding irritating substances. You can help the improvement by * Avoid scrubbing the skin. * Use as little soap as possible. Use gentle cleansers instead. * Avoid applying cosmetic lotions or ointments directly on the rash. * Use warm (not hot) water for cleaning. XXXXXXX dry, don't rub. * Eliminate any newly added cosmetics or lotions. * Leave the affected area exposed to the air as much as possible. * Try calamine medicated lotion. * Hydrocortisone cream (1%) is available without a prescription and may soothe many such patches. The patches usually take 5-7 days to disappear. If the patches become more of purple rather than red then you must consult a dermatologist immediately. Please feel free to discuss further. I will be glad to answer the follow up queries that you have. Wishing you good health. Regards. Dr. Rakhi Tayal. For future query, you can directly approach me through my profile URL http://bit.ly/Dr-Rakhi-Tayal

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