Three months without menstruation is not necessarily considered to have been menopausal, but may also be due to disease factors, such as hyperthyroidism, uterine adhesions and so on. 1. Menopause: refers to the permanent cessation of menstruation caused by the failure of ovarian function. Menopause can only be recognized after 12 consecutive months of menopause. In addition to changes in menstruation, menopausal women may also experience facial flushing, palpitations, agitation, irritability, vaginal dryness, loss of skin elasticity, and other symptoms. 2. Hyperthyroidism: It is a disease caused by many reasons that the thyroid gland itself produces too much thyroxine, and the patient may have high metabolic syndrome such as fatigue, excessive sweating, weight loss, etc. In addition, the female patient may also have a prolonged menstrual cycle, or even amenorrhea, and the patient may have an excessive appetite. 3. Uterine adhesion: the cause is not clear, mostly related to endometrial trauma, infection, low estrogen levels and other factors, patients mainly manifested as menstrual abnormalities and cyclic abdominal pain, and in severe cases, amenorrhea can occur. In addition, there are many other reasons for not having menstruation for three months, so it is recommended that patients go to the hospital in time to find out the cause of the disease and receive treatment as soon as possible.