During my period most of my blood comes out in quarter-sized clumps. My periods are normally heavy, but do these clumps mean that something is wrong?
– Jessica*

It's perfectly normal to notice some clumps from time to time during your period. These are blood clots that may contain tissue. As the uterus sheds its lining, this tissue leaves the body as a natural part of the menstrual cycle. So clots of tissue are usually nothing to be concerned about. But if you notice large or frequent clots, talk to your health care provider to make sure your period is normal.

You also mention that your periods are heavy. If your period soaks through more than one pad or tampon every 1–2 hours, talk to your doctor or nurse practitioner. It's also a good idea for a girl to get checked out if her periods last for longer than a week or if she is having a lot of pain with her periods.

*Names have been changed to protect user privacy.