Children’s underarm odor may be caused by not paying attention to local hygiene, excessive secretion of sweat glands, armpit odor, etc. It can be relieved by paying attention to hygiene, using medication, physical therapy and other methods. 1. Not paying attention to local hygiene: if children do not pay attention to local hygiene in daily life, do not often take a bath, change clothes, will lead to the accumulation of sweat in the armpits, underarm odor. At this time, parents should pay attention to instruct their children to bathe and change clothes frequently. 2. Excessive secretion of sweat glands: the child’s metabolism is more vigorous, if the child is too much exercise in the summer, it is easy to increase the secretion of sweat, and if it fails to dry the sweat in a timely manner, there may be underarm odor. At this time, the child should pay attention to keep the armpits clean and dry, change clothes, armpit odor can disappear. 3. Armpit odor: it can be treated by injection of botulinum toxin and removal of sweat glands. If there is a child underarm odor, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, give targeted treatment or standardized treatment.