Sweat with ammonia odor may be a normal phenomenon, or it may be caused by kidney failure. 1. Normal phenomenon: Normal body metabolic process will discharge sweat, and sweat will contain urea, amino acids and other wastes, at this time, sweat and skin surface staphylococcus or staphylococcus aureus and other bacteria combined, may lead to sweat ammonia odor. 2. Kidney failure: patients with kidney failure can not remove toxins from the blood in time, at this time the toxins in the blood will be discharged from the body through sweat, breathing and other ways. Generally, the sweat of patients with renal failure will contain urea, and they may smell the ammonia odor in their sweat. It is recommended that patients with ammonia odor in sweat need to seek medical treatment from regular hospitals in time, and need to choose appropriate measures for treatment under the guidance of doctors.