Body sweating is very oily, may be physiological phenomenon, may also be endocrine disorders, hyperhidrosis and so on. 1. Physiological phenomenon: hot environment, drinking water less sweat, or have strenuous exercise, heavy physical labor, cleaning is not timely, sweat oil accumulation, may lead to the body sweating is very oily. 2. Hyperhidrosis: and mental factors, disease factors, can lead to an abnormal increase in local or systemic sweating, can also lead to the phenomenon of very oily body sweating. 3. Endocrine disorders: such as androgen metabolism abnormalities, may cause an increase in the amount of oil secretions in the sweat, which leads to the body sweating very oily. Body sweating is very oily, there may be other reasons, need to go to the hospital in time to check, clear cause, follow the doctor’s instructions for treatment.