The odor of the body is considered to be related to the lack of attention to personal hygiene, smelly sweat, phenylketonuria, diabetic ketoacidosis and so on. 1. not pay attention to personal hygiene: for some people who usually do not pay attention to personal hygiene, may be because the sweat stays on the skin surface or clothing and odor phenomenon. 2. stinky sweating: stinky sweating is related to abnormal secretion function of top secretion glands and bacterial decomposition on the skin surface, etc. Typical symptoms of the patients are special pungent odor in the armpits and soles of the feet, etc., which is more obvious especially in the summer after exercise, so it can be manifested as a bad smell on the body. 3. Phenylketonuria: Phenylketonuria is an autosomal recessive disease, gene mutation is the main reason. The disease will cause patients to appear growth retardation, personality abnormalities, dry skin, sweat and urine accompanied by moldy odor, can also be manifested as body odor. 4. Diabetic ketoacidosis: patients with diabetic ketoacidosis can exhale rotten apple odor, which is manifested as body odor. Diabetic ketoacidosis and diabetic patients with poor glycemic control has a certain relationship, but also easy to be accompanied by drinking, eating, urinating, mental depression, sunken eyes. It is recommended that people with foul body odor strengthen personal hygiene care, shower or change clothes frequently. If the symptoms do not improve or aggravate, you should consult a doctor in time.