Conversation: The conversation between human and AI assistant.
[|Human|] my daughter has formed big brown patches under her armpit. they have been there for a while but today she showed me they are spreading down her side & on her stomach. what could it be? She is 16 and her doctor put her on birth control pills after her surgery for endometriosis and something is up with her thyroid getting that checked again. but she had the brown spots for a few years before any of this. help
[|AI|]  Hi, Thanks for writing to us. From the description provided I could think of few possibilities fungal infection or tineapityriasis tricolor- again a superficial fungal infection which can present as hyperpigmented lesions. However, commonly causes hypopigmented lesionserythrasma- a bacterial infectionacanthosis Nigerians thickening and pigmentation of skin. The exact diagnosis can only be reached either by consulting a dermatologist nearby or by using ASK A SPECIALIST feature of this website. Once the diagnosis has been confirmed, appropriate treatment can be provided. Take care