Hymen is a very thin vascular membrane located at the mouth of the uterus, which is generally more prone to breakage, even through the pants, if the external impact or role of the force is strong, it is very likely that the hymen will be broken. If you find any abnormality on your private parts or underwear, you must go to the hospital for examination in time. However, just rubbing through the pants, do not worry about the possibility of pregnancy, because the chance of conception through the pants is basically zero. In daily life girls are likely to cause hymen rupture when doing some strenuous exercise, so more attention should be paid in daily life.