The lining of your womb is called the endometrium. This shrinks after you go through the menopause and your periods stop. However, in some women, it can grow back abnormally, and in the worst case scenarios, this can cause a cancer of the womb lining.
The classic symptom of this is bleeding from the vagina AFTER you have been through the menopause.
If this happens, get in touch with your doctor.
This cancer is VERY rare in women before the menopause but if you get bleeding at a time you are not expecting, always check with your doctor.