There are many possible causes and a thorough review of your history and medications is important.
Unscheduled bleeding can be caused by:
- Trauma (intercourse)
- Hormonal changes (due to medications – especially birth control pills or other forms of contraception)
- Not ovulating
- ￼Abnormal lining of the uterus (hyperplasia or cancer).
Keeping a bleeding diary can be very helpful for your healthcare provider to figure out the cause and ultimately a treatment.