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.

What do large blood clots during period mean?

People may worry if they notice clots in their menstrual blood, but this is perfectly normal and rarely cause for concern. Menstrual clots are a mixture of blood cells, tissue from the lining of the uterus, and proteins in the blood that help regulate its flow.

When should I be concerned about blood clots in my period?

If you need to change your tampon or pad after less than 2 hours or you pass clots the size of a quarter or larger, that is heavy bleeding. If you have this type of bleeding, you should see a doctor. Untreated heavy or prolonged bleeding can stop you from living your life to the fullest. It also can cause anemia.