Armpit odor can often occur after puberty; girls usually develop armpit odor between the ages of 13 and 19, while males are about 2 years later than females. Armpit odor is most often caused by active sweat glands in the armpits that produce excessive sweat. Since the sweat glands begin to become active during puberty, this condition can often occur after puberty. In women, puberty occurs earlier, so the symptoms of armpit odor also occur earlier, usually between the ages of 13 and 19. In men, it can occur about 2 years later than in women. There is mostly a family history of armpit odor and symptoms are usually worse in the summer months. The exact age of puberty can be somewhat individualized, so the age of onset of armpit odor is not absolute. Usually female puberty is earlier than male, and the age of appearance of armpit odor is also earlier in females than in males. Daily life should be diligent bathing, change underwear, keep the armpit skin dry and clean, etc., but also can be used externally perfume. Surgical treatment such as sweat gland removal can be performed if necessary.