I have melasma . It has started to flared up a year ago. It is spreading all over my checks. I do wear suncreen 100. What does thyroxine have to do with it? I am in my middle age.
Hello, plasma caused by disorders like Poly cystic ovarian disease, thyroid and those who are on oral Contraceptives, it also develops during and after pregnancy in women, and in the premenopausal phase of middle-aged women. Exposure to sun may aggravate this problem, however it is not the exposure to sun that causes plasma. Use sunscreen.  Take care.