What’s with the thick lining of the uterus twice a month?

Twice a month menstruation endometrial thickness is considered to be endometrial hyperplasia, which may be caused by obesity, or diseases such as polycystic ovary syndrome and ovarian tumors.
1. Obesity: because the human body obesity will increase the peripheral fat cells of estrogen secretion, and then will make the endometrial hyperplasia, the phenomenon of two menstrual periods a month.
2. Polycystic ovary syndrome: the cause of this disease is not yet clear, but studies have shown that it may be related to genetics, metabolic disorders, environmental factors, so it will cause endometrial hyperplasia. Its typical symptom is menstrual disorders, which are mostly characterized by irregular menstrual cycles and irregular uterine bleeding, so some patients may experience menstruation twice a month.
3. Ovarian tumor: the causes of this disease include heredity, endocrine disorders, smoking, vitamin deficiency, ionizing radiation, etc. Generally, there is no symptom when the tumor is small, but if the tumor is large, there will be irregular vaginal bleeding, which can be manifested as twice menstruation in a month, and endometrial hyperplasia can be found through examination.
Endometrial hyperplasia can be caused by more than one reason, so it is necessary to go to the hospital to improve the examination and clarify the cause of the disease.