hyperhidrosis
"I used to sweat under the arms excessively.  All my tee shirts had yellow stains.  My doctor prescribed this once back in 2000.  Yes it burned somewhat, but it totally stopped the underarm perspiration.  I haven't sweated under my arms much since about the end of 2000.  I had the prescription renewed in June 2001, and that bottle is still half full, since I have totally stopped underarm perspiration, and I haven't had to use it in 11 years!"