Armpit odor may be caused by insufficient cleaning, dietary factors, genetic factors and other reasons. 1. Insufficient cleaning: if the local sweating, do not pay attention to cleanliness and hygiene, the secretion of sweat glands in the local accumulation, bacterial growth, thus causing patients to appear underarm odor symptoms. 2. Dietary factors: if long-term consumption of food with irritating odor, such as onion, garlic, etc., may be discharged with foul-smelling sweat, which leads to the emergence of armpit odor. 3. Genetic factors: armpit odor has a certain hereditary possibility. If the patient’s parents or siblings have more armpit odor, it may be related to heredity. You should pay attention to personal hygiene and strengthen the cleanliness of hygiene in your daily life. If armpit odor seriously affects the daily life of patients, it is recommended to go to the regular hospital in time, under the guidance of professional doctors targeted treatment.