If the weather is particularly hot, or if the patient is fat, it may be normal for sweating to occur with the slightest exercise. However, it is important to note that in patients with hyperthyroidism, the body itself produces more heat due to an elevated basal metabolic rate, so a little exercise makes it easier to sweat profusely as the muscles are also producing heat, and the two add up. If you are still experiencing this phenomenon after excluding physiological causes such as temperature, you can go to a hospital endocrinology department to check if it is caused by a disease.