Sweating at the back of the neck can be caused by hot weather, strenuous exercise, hyperthyroidism and other factors. 1. Hot weather: If the external ambient temperature is too high, it will promote the body’s metabolism, and at the same time, the body will balance the internal and external ambient temperature balance, which will cause a lot of sweating on the back of the neck. 2. Strenuous exercise: If you do a lot of strenuous exercise, it will promote the body’s metabolism and enhance the secretion of sweat glands, leading to the symptoms of sweating at the back of the neck. 3. Hyperthyroidism: When the thyroid gland is hyperactive, it secretes a large amount of thyroxine, which increases the body’s basal metabolism, and the sweat glands in the nape of the neck are more abundant, which can lead to the symptoms of sweating in the nape of the neck. In order to identify the cause of the condition and to relieve sweating at the back of the neck, it is recommended to go to the hospital in time to have the cause of the condition identified and then have targeted treatment.