A: The exact cause of armpit sweat is unknown, but it’s thought to be caused by a combination of factors. Among those are genetics, hormonal changes and the amount of fat under your arms. For most people, sweating due to this problem is a sign that something isn’t right or needs attention. This can include medications or other health conditions you may have as well as environmental issues such as excessive heat. It also can happen if you’re exercising strenuously for an extended period – about 60 minutes – without taking breaks because you’re overheating and not drinking enough fluids. If your armpits become red and tender after exercise, take a break from activity before going back out into the heat again until they return to normalcy.
Sweaty pits — what causes them?