The simplest thing is to inject botulinum toxin, and you can get rid of underarm odor after injection. That is to say, the pharmacological action of botulinum toxin A is used to inject botulinum toxin A into the appropriate part of the armpit, and the acetylcholine released by sympathetic postganglionic fibers that dominate sweat glands will decrease, resulting in the gradual shrinkage of sweat glands in the armpit area and the gradual reduction of sweat secretion, thus achieving the purpose of removing bromhidrosis. But the effect is not permanent, usually about half a year. Minimally invasive osmidrosis is needed to be effective permanently.