I sweat excessively, especially on my face. When I go outside in hot weather, I sweat a lot. I also sweat while cooking, and even after applying makeup, I start sweating just by walking for a short while. Most of the sweating is from my face. I have also noticed that the skin around my upper and lower lip has become tanned/darker, possibly due to frequent sweating. I would like to know why I am sweating so much and what treatment or skincare would help control the sweating and the pigmentation around my lips.