How Do I Stop Underarm Sweating?

Like a previous answer, use Certain Dri. I have the same horrible problem and it doesn't go away by age 25. If anything, it's gotten worse. (I'm now 28.) But this stuff really works! Put it on at night and after awhile it will work for longer than a day! I've been using it for about 4 months now and I only need to put it on every other night. I have no problem with wetness during the day. I don't even have to blot my under arms with tissues anymore. This stuff is great. Try Certain Dri, it works.