Weight loss is usually carried out in two ways: exercise and medication. If medication is used to lose weight, it will affect endocrine secretion to a certain extent, which will cause menstrual irregularities and thus no menstruation; while exercise is used to lose weight, which destroys the muscle ratio for maintaining menstruation or fat loss, which will cause abnormal menstruation. Regardless of the method of weight loss, it is possible to cause non-menstruation.