What causes itchy rash on the arm?
Patient: About a month ago I developed a small rash in the antecubital region of my left arm. I applied some Aquaphor for a few days and it went away. Well, yesterday it reappeared. I have kept Nystatin on it and it seems to be going away. It is only slightly itchy but the first day was really red. What is this? Doctor: Hi! Thank you for your question!As you mention nystatin, that is an antifungal agent, and your rash seems to disappear it could also be a dermatophytosis (fungal infection). I would recommend you continue with Nystatin txice  a day for at least 2 weeks, and also a week after the lesion disappears.It could also be a dermatitis, and that`s why it went away with Aquaphor. Sometimes this two conditions can present together, that`s why I also recommend you use a topical OTC corticosteroid once a day for 1-2 weeks. you can also mix the two medications together. You can continue with Aquaphor, several times a day to hydrate the skin.I hope you get better. Please feel free to contact me again if anything is unclear.Dr. Migena GEGA