Why do underarms sweat a lot?
If you are one of those people who sweat profusely under your arms you may have axillary hyperhidrosis, which means excessive underarm sweating.DefinitionsPrimary hyperhidrosis means that you sweat excessively for no obvious reason. If you have secondary hyperhidrosis this means that you sweat excessively because of social anxiety disorder, for example, or because of some underlying medical condition.CauseAxillary hyperhidrosis occurs when the sympathetic nervous system is over-stimulated. There does not seem to be a hormonal component to this condition although it may first pop up in puberty.HypothalamusThe hypothalamus in the brain regulates sweat related functions. It sends signals to the sweat nerves, which are a part of your sympathetic nervous system that is situated in your chest cavity. Messages are then sent from your sympathetic nervous system to the sweat glands telling them to sweat. If you have hyperhidrosis, the sweat glands do not behave as they should. Signals are ignor
