For women, the lining of the uterus does not thicken when they have normal menstruation, it thins; if menstruation is not normal there is a possibility that the lining will thicken.
Menstruation is under the action of ovarian secretion of estrogen and progesterone, progesterone withdrawal leads to endometrial exfoliation and cause bleeding, so when menstruation, the endometrium will be due to exfoliation and thinning.
However, it is also important to note that if a woman is under stress or has a combination of gynecological endocrine diseases, this may lead to irregular ovulation of the ovaries and an imbalance in the secretion of estrogen and progesterone, resulting in the thickening of the endometrium due to the continuous proliferation of estrogen and the emergence of breakthrough bleeding, which may be manifested as a thickening of the endometrium at the time of menstruation.
For women with irregular menstruation, it is recommended that they go to the gynecology department of a regular hospital to improve ultrasound, sex hormones and other related tests to assess the thickness of the lining and ovarian function, and then take active treatment under the guidance of the doctor after clarifying the cause of the disease.