he can do several things. First, believe it or not--shampoo. It is hair; treat it as such. Second, powder unscented powder when he towels off after a shower. third for the underarms, he should use a deodorant not an antiperspirant (they contain aluminum compounds sometimes).
If he is an athlete and wears a cup for sports, be sure to wash it often and he should shower after sports.
Wayne Yankus, MD, FAAP
expert panelist: pediatrics