I had this problems a year ago. Initially I neglected it....but then the itching got worse. After visiting the dermatologist I realized that it was because of the deodorant. Itchy armpits is not that serious problem, but strong desire to start scratching your underarms especially when you are in a crowd can be really annoying.
Did you know that there could be at least 19 different reasons to why your underarms itch? Many of them harmless, but some of them do require medical attention.