Why Is My Period So Heavy? Common Causes
Heavy period causes
Quick answer
Your period may be so heavy because of hormone changes, growths in the uterus like fibroids or polyps, a copper IUD, some medicines, or a bleeding disorder. Bleeding is often heaviest in the first 2 days. If your periods get heavier than usual, see a doctor to find the cause.
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- Periods can be heavier when they first start and near menopause.
- Fibroids, polyps, a copper IUD and some medicines can play a part.
- A gush when you stand up can be blood that pooled overnight.
- A change from your usual period is worth a doctor visit.
What causes heavy periods?
- Hormone changes. Periods can be heavier when they first start, after pregnancy, or near menopause.
- Fibroids or polyps. These are growths in the uterus (womb). They are usually not cancer.
- Endometriosis or adenomyosis. This is when tissue like the womb lining grows where it should not.
- A copper IUD, a type of birth control.
- Some medicines, like blood thinners.
- A bleeding disorder, like von Willebrand disease. It makes you bleed more easily.
- Pregnancy problems, like a miscarriage.
- Other health problems, like thyroid disease. Rarely, cancer of the womb.
Why is my period so heavy this month?
Your flow can change a bit from month to month. One heavy period is not always a problem. But a change in your periods should be checked by a doctor.
Think about what is new. Did you get a copper IUD or start a new medicine? Tell your doctor. If you could be pregnant and you are bleeding, call a doctor right away.
Sudden gush of blood during your period
Blood can collect in the vagina while you lie down. When you stand up, it can come out in a rush. This gush is usually normal.
But if blood pours out and soaks your pad or tampon every hour, call your doctor.
Heavy periods in teens
In the first year or so of periods, the body may not release an egg each month. This can make periods heavy or irregular.
Heavy periods can also be a sign of a bleeding disorder. Other signs are nosebleeds that are hard to stop and bruising easily. If your teen has these signs, see a doctor.
Stay comfy while you find the cause
Period underwear will not change your flow. But it can be a comfy backup while you get answers. Kischt period underwear has three absorbent layers and a moisture barrier. It is made to help stop leaks reaching your clothes.
On your heaviest days, wear it with a tampon, cup or pad. The protective area runs up toward the back, for extra coverage when you sit or lie down.
Comfy backup while you get answers
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Common questions
Why is my period so heavy on the second day?
Bleeding is often heaviest in the first 2 days. That is normal. But soaking through a pad or tampon every hour for several hours is not, so call your doctor.
Why does period blood pour out like water?
Blood can pool while you lie down, then rush out when you stand. If it soaks your pad or tampon every hour, call your doctor.
What can cause a sudden heavy period?
It can come from a hormone change, a growth like a fibroid, a copper IUD, a new medicine, or a pregnancy problem. Only a doctor can tell. If you could be pregnant, get care right away.
Can a teenager have heavy periods?
Yes. In the first year or so, the body may not release an egg each month, which can make periods heavy. A bleeding disorder can also cause them, so see a doctor.
Can period underwear help with heavy periods?
It will not change your flow, but it can be backup. Kischt has three absorbent layers made for heavier flow days. On your heaviest days, pair it with a tampon, cup or pad.
More guides
- Heavy period guideWhat Is Considered a Heavy Period?
- Period clots guideHeavy Period With Clots: Is It Normal?
- Heavy period tipsHow to Manage Heavy Periods (Day and Night)
- Heavy period guidePeriod Flooding: What It Is and What to Do
See all guides: Period Underwear Guide: Every Question Answered
Sources
- Mayo Clinic: Heavy menstrual bleeding, symptoms and causes
- NHS: Heavy periods
- NHS: Periods
- ACOG: Heavy Menstrual Bleeding
- CDC: About Heavy Menstrual Bleeding
- CDC: Bleeding Disorders in Tweens and Teens
- Cleveland Clinic: Menorrhagia (Heavy Menstrual Bleeding)
- MedlinePlus: Vaginal or uterine bleeding
- Center for Young Women's Health, Boston Children's Hospital: Gush of blood when standing up
Updated by the Kischt team.
This page is general information, not medical advice. See a doctor if you are worried about your health.
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