hyperhidrosis
"Living I Phoenix, I rarely wear blouses with sleeves - most days it is a tank top with a jacket thrown over for the office.  So, sweating in the pits is not an option unless I get my jackets dry cleaned after every use.  I have been using Certain Dri roll-on, after trying various other 'clinical strength' antiperspirants for a few years now.  While it has always itched when I apply the roll-on version at bed time, the solid version does not but I noticed some dampness in my pits with the solid.  So, i am sticking to roll-on - worth the mild itching for completely dry pits."