Dear Dr. Cheese,
Ive got this red, itchy rash under my arms. Am I allergic to deodorant?
Itchy
Dear Itchy,
According to my calculations, you have developed an allergy to armpit hair. You will need to remove all traces of hair from wherever the rash has spread to. But DO NOT shave; this will only make the irritation worse. Try waxing instead, and you might get the added benefit of removing the layer of skin that contains the rash.
~Kevin