Causes of abdominal distension during menstruation

Menstruation estrogen level decreases, endometrium loses hormone support, appear convulsion and contraction, will appear abdominal pain symptoms, also known as primary dysmenorrhea, dysmenorrhea can be manifested as abdominal pain, can also be manifested as waist pain or pain. If dysmenorrhea is more serious, it may be related to genital tract stenosis, infection, tumor and other factors.