Early menopause in a 40-year-old woman belongs to early onset ovarian insufficiency. Clinical manifestations include menstrual changes, low estrogen levels, menopause and other symptoms. 1. Menstrual changes: with age, ovarian function changes from instability to decline, and the balance is imbalanced. Before menopause, abnormal menstruation, menstrual cycle disorder, prolonged menstruation, bleeding, etc. often occur, while symptoms such as premenstrual tension syndrome, breast cyclic swelling and pain, edema, headache, etc. disappear. 2. Decrease in estrogen level: 40-year-old women enter menopause early if there is a decrease in estrogen level, the clinical manifestations of menstrual disorders, low menstrual flow or even no menstruation. Premature ovarian failure is more common in the clinic, breasts may gradually shrink, and women’s vaginas will be drier. 3. Menopause: At the age of 40, ovarian function declines, and even menopause leads to infertility, which is most commonly characterized by bouts of hot flashes and night sweats, accompanied by temper tantrums, depression and even significant insomnia and headaches. 40-year-old woman early menopause if there are the above signs, the symptoms are serious, you can go to the gynecological examination of the regular hospital, to find out the specific causes, and then carry out a certain amount of conditioning.