Q: When should I start using a deodorant? My father uses Old Spice. Should I use that brand?
A: Whether you wish to use a deodorant is a matter of personal preference, not something that is required for any health reason. When boys enter puberty, they become very conscious of their physical appearance because of the many changes that are occurring. Around mid-puberty (several years after pubic hair first appears), most boys notice an increase in the amount and odor of their sweat.
For most young men, this happens around age 13. Because they are self-conscious about their appearance, they often wish to use a deodorant. However, being careful about regular bathing or showering is probably more important as a means of keeping the skin clean and odor-free.