staining on shirt collar

i have recently started staining my shirt collar a burnt orange color, this has never happened before and I don't wear makeup. what could cause this?

[Bhupinder Kaur, MD]

Hello,
The only possibility that is coming to my mind is of chromhidrosis. It is characterized by the secretion of colored sweat and can be due to increased numbers of lipofuscin pigments in the secretory apocrine cells. Wood lamp examination and histopathological examination of the skin biopsy specimens need to be done. My sincere advice is to consult a dermatologist.

It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your dermatologist. Treatment can be started only when the diagnosis is confirmed. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.