A female cannot always feel when her hymen is broken. Some women may feel pain and experience bleeding when it is broken, but other women do not feel anything, according to SexInfo Online. Further examination by a gynecologist may be used to determine if the hymen is intact.
According to Wikipedia, the hymen is a membrane that surrounds or partially covers the external opening of the vagina. It is similar to the structure of the vagina itself, and forms part of the external genitalia. In addition to penetrative vaginal sexual intercourse, the vagina can also be broken by tampon usage or extreme physical activity.