The uterus is relatively large in the clinic is caused by the following reasons: first, the inflammation of the uterine body will be under the stimulation of chronic inflammation, resulting in hypertrophy of the uterine muscle, so in the clinic through the ultrasound, gynecological examination will be found in the uterus has the phenomenon of enlarged, the localization will be the pressure and pain. The second one is caused by adenomyosis, which is mainly endometriosis in the myometrium, and every time you have menstruation, the foci of ectopic disease in the myometrium will have bleeding, and every time you have menstruation, you will have bleeding, which will make the myometrium hypertrophied and enlarged, and so the uterus will appear to be enlarged. Thirdly, the uterus is enlarged clinically due to uterine fibroids, which can be diagnosed by ultrasound. Fourthly, pregnancy can cause uterine enlargement.