Sweating profusely when the day is hot is usually associated with physiological factors, hyperthyroidism, tuberculosis, etc. 1. Physiological factors: when the weather is hot, the body’s metabolism is more vigorous, sweating more than usual, which is a normal reaction. 2. Hyperthyroidism: when the thyroid function is in a state of hyperthyroidism, it will cause the thyroid hormone secretion, resulting in rapid metabolism, promote the body’s energy consumption, so there will be excessive sweating. 3. Tuberculosis: due to the infection of tuberculosis bacillus, the bacteria in the body will have metabolites, stimulate the central regulatory function of the human easy to cause sweating, afternoon and night low fever and other symptoms, and will be accompanied by coughing, sputum. These are only some of the common causes. If the symptoms persist or recur, you should consult a doctor. After a clear diagnosis, follow the doctor’s instructions to standardize the treatment.