Abnormal uterine bleeding (AUB) is bleeding from the uterus that is longer than usual or that occurs at an irregular time. Bleeding may be heavier or lighter than usual and occur often or randomly.
AUB can occur:
- As spotting or bleeding between your periods
- After sex
- For longer days than normal
- Heavier than normal
- After menopause
It does NOT occur during pregnancy. Bleeding during pregnancy has different causes. If you have any bleeding when you are pregnant, be sure to call your health care provider.
AUB is unpredictable. The bleeding may be very heavy or light, and can occur often or randomly and may include:
- Bleeding or spotting from the vagina between periods
- Periods that occur less than 28 days apart (more common) or more than 35 days apart
- Time between periods changes each month
- Heavier bleeding (such as passing large clots, needing to change protection during the night, soaking through a sanitary pad or tampon every hour for 2 to 3 hours in a row)
- Bleeding that lasts for more days than normal or for more than 7 days
Other symptoms caused by changes in hormone levels may include:
- Excessive growth of body hair in a male pattern (hirsutism)
- Hot flashes
- Mood swings
- Tenderness and dryness of the vagina
A woman may feel tired or fatigued if she loses too much blood over time. This is a symptom of anemia.