Sweating on the neck and chest after a woman wakes up from sleep may be caused by factors such as high room temperature, hypoglycemia, and hyperthyroidism. 1. High room temperature: When a woman sleeps, the room temperature is too high, which may lead to sweating on the neck and chest after waking up, which is generally a normal reaction. 2. Hypoglycemia: the body usually belongs to the fasting state after waking up, when the fasting state, such as the occurrence of hypoglycemia, will easily lead to sympathetic excitation, thus appearing the phenomenon of female sweating. 3. Hyperthyroidism: usually associated with increased metabolic rate and other factors, once the body circulates too much thyroid hormone, it is also easy to lead to the phenomenon of body sweating. When women experience sweating on the neck and chest before and after waking up, it may also be related to other factors. Excluding physiological factors, such as recurring symptoms, it is recommended to go to the hospital in time for examination and under the guidance of the doctor for examination and treatment.