Seven-year-old children have armpit odor, may be a normal phenomenon, may also be abnormal phenomena, such as localized stinky sweating. Children in a long time not clean skin, especially in the summer heat, activity after local sweat gland secretion increase, not timely dry, bacteria and local sweat gland secretion of organic matter, produce unsaturated fatty acids and ammonia-like substances, at this time the armpit can emit odor. Armpit odor, commonly known as fox odor, for the dominant gene genetic disease, with obvious family genetic predisposition, most have hyperhidrosis. In the armpit sweat gland distribution is more, and by the endocrine influence. If the pediatric armpit odor occurs, mostly in excessive sweating, sweat is not easy to evaporate and sweat glands are located in the area, the sweat by microbial decomposition, the formation of a special odor. When armpit odor occurs in children, in addition to paying attention to hygiene and cleanliness, you can also consult a doctor to take appropriate treatment measures to alleviate the symptoms.