There are many causes of back undershirt sweating. If you have participated in intense exercise, which causes a lot of sweating in the back, it is a normal phenomenon. It is only necessary to dry the sweat in time after stopping the exercise to prevent a cold; neurosis is when the mental tension or stress is high, the plant nerves are active and sweating symptoms can occur, and the symptoms can disappear after emotional stability. In addition, if the patient is suffering from tuberculosis, night sweats can appear, mostly at night, and also with low fever in the afternoon, so it is necessary to improve the examination of tuberculosis.