Why do my eyebrows fall out so much after i sweat? or exercise or if i'm in a very hot environment

Stop picking: If you are wearing a headband that hits the eye brow and forehead it may be rubbing the hair off. If you are constantly feeling and picking that area it will also get irritated and fall out as well. Your doctor can help & make sure you are not losing hair on your head as well, which can be stress related, genetic, or hormone related. Male pattern baldness or alopecia may be occurring.

Unusual problem: Hello, I would say it is unusual to have the actual eyebrows fallout after sweating but there are studies that show that your body's heat can affect the growth and the follicular development which may cause the eyebrow to fall out. There are other diseases that can cause problems and should check with a physician about the problems as thyroid may be a problems also. Hope you found this helpful.