Recognizing Bleeding Symptoms: What to Watch For

This article is about bleeding disorders in people: adults, teens and children. Most bruises and nosebleeds are ordinary and have nothing to do with a bleeding disorder. But some patterns are worth a closer look.

Dr. Joe Moleski, Hemo-Health's physician, lives with hemophilia himself. Below is a plain checklist built on the CDC's own thresholds, what to watch for in babies and kids, and what a doctor checks during an evaluation. It can help you decide when to get checked. It can't diagnose you.

What are the signs of a bleeding disorder?

A bleeding disorder means your blood doesn't clot the way it should [14]. The most common one is von Willebrand disease (VWD). It is found in up to 1% of people in the US, and it affects men and women at similar rates [2]. Hemophilia is rarer.

Signs worth talking to a doctor about:

• Nosebleeds that start for no clear reason and last longer than 10 minutes, or that need medical care [1]
• Bruising with no injury you can remember, or frequent bruises that are larger than a quarter and raised [1][2]
• A cut that keeps bleeding for more than 5 minutes [2]
• Heavy bleeding after dental work, surgery or childbirth [1][2]
• Bleeding into a muscle or joint with no injury [1]
• Heavy periods (details below) [1]
• Low iron, or past treatment for anemia [1]
• Blood in your urine or stool [7]
• A family member with a bleeding disorder, such as VWD or hemophilia [1]

The CDC says to talk with a doctor if you have one or more of these signs [1].

Some bleeding can't wait for an appointment. Get emergency help right away if bleeding can't be controlled, if it follows a serious injury, or if you think there may be internal bleeding [11]. Dizziness or light-headedness after an injury can be a sign of shock [11].

When should you worry about bruising?

A bruise happens when an injury crushes small blood vessels under the skin without breaking it [12].

Bruising is more of a concern when:

• it shows up with no injury you can remember [1]
• it happens often (one to four times a month), and the bruises are larger than a quarter and feel raised or lumpy [2]

MedlinePlus advises seeing a health care provider if you seem to bruise for no reason [12]. When you go, bring a list of every medicine you take, including over-the-counter ones. Some medicines can increase bleeding, and doctors ask about them [2][8].

Can heavy periods be a sign of a bleeding disorder?

Yes. About 1 in 5 girls and women have heavy menstrual bleeding, and about 1 in 4 of those have a bleeding disorder [3].

The CDC's signs of heavy menstrual bleeding include [1]:

• bleeding that lasts longer than 7 days, from start to finish
• flooding or gushing that limits work, school, exercise or social plans
• passing clots bigger than a grape
• soaking a pad or tampon every hour or more often on the heaviest days

CDC's VWD page uses a slightly wider net: soaking a pad or tampon every 1 to 2 hours on the heaviest days, or clots larger than grapes or strawberries [2]. Heavy bleeding after childbirth or a miscarriage is another sign [10].

Many women are told their periods are "just heavy." In one small study that CDC cites, women waited an average of 16 years between the start of abnormal bleeding and a diagnosis [3]. If you are a woman with a family history of hemophilia, read Women as Hemophilia Carriers.

Are frequent nosebleeds or bleeding gums a warning sign?

Usually not. Nosebleeds are very common, and most come from minor irritation inside the nose, often from a cold [13].

They are more of a warning sign when they [1][2]:

• start for no clear reason
• happen often (five or more times a year)
• last longer than 10 minutes
• need packing (gauze in the nose) or cautery (sealing the blood vessel) to stop

A nosebleed that doesn't stop after 20 minutes needs emergency care [13].

For the mouth, CDC lists bleeding of the mouth and gums, and bleeding that is hard to stop after losing a tooth, among the signs of hemophilia [4]. After dental surgery, oozing that lasts longer than 3 hours, or that needs packing, is a sign of VWD [2].

What signs should parents watch for in babies and children?

In babies and young children, watch for:

• bleeding after circumcision that takes a long time to stop [4][6][9]
• bleeding after shots, such as vaccinations [4]
• bleeding from the umbilical cord stump that lasts longer than usual or won't stop [7]
• bleeding in the head after a difficult delivery [4]
• bleeding problems that appear as a baby starts crawling and walking [6]
• joint swelling, pain or tightness, often in the knees, elbows or ankles [4]
• bleeding from the mouth, or bleeding that is hard to stop after losing a tooth [4]

No family history doesn't rule it out. About 1 in 3 babies born with hemophilia have no known family history [5]. Many children with hemophilia are diagnosed before age 2, but mild hemophilia is diagnosed later: at a median age of 36 months, compared with 1 month for severe [5].

Can you have a bleeding disorder and not know it?

Yes. People with a mild bleeding disorder may have no symptoms until they are injured or have a medical procedure. Signs may not be noticed until adulthood [7]. Mild hemophilia is often found only when an injury, surgery or tooth extraction leads to prolonged bleeding [9].

If some of the signs above sound familiar, it is worth raising them with your doctor, especially before a planned surgery or dental procedure.

What tests check for a bleeding disorder?

An evaluation starts with questions, not needles. A doctor will ask about your own bleeding history, your family's history, and the medicines you take, and will look for bruising or signs of recent bleeding [2][8].

Blood tests may include [8]:

• Complete blood count (CBC), which includes platelets
• Prothrombin time (PT) and partial thromboplastin time (PTT), which measure how long blood takes to clot
• Von Willebrand factor tests, which measure how much VWF you have and how well it works
• Clotting factor tests, which measure the level or activity of a specific clotting factor

For hemophilia, a clotting factor test (an assay) shows the type and the severity [4][9]. Read more in Hemophilia Types and Severity Levels.

Testing isn't always one-and-done. VWF levels can change with stress, exercise, birth control pills and pregnancy, so some tests may need to be repeated [10]. NBDF notes that hemophilia treatment centers (HTCs) often have specialized labs for VWD testing [10].

The next step is an evaluation. Unexplained bleeding symptoms are one of the things Hemo-Health helps with by telehealth. We go through your bleeding history and family history together, and decide which tests make sense. When you contact us, we'll explain how testing works for your situation. We work alongside HTCs, not instead of them. Learn more about our hemophilia and bleeding disorder care. Availability depends on your state and our licensure; see States We Serve.

Frequently asked questions

Can men have von Willebrand disease?

Yes. VWD affects men and women at similar rates. Women are more likely to notice it because of heavy periods and bleeding after childbirth [2].

Should I see a hematologist for easy bruising?

Start by talking with a doctor about your symptoms [1]. NBDF says an HTC is the best place for people with bleeding disorders to be diagnosed and treated [10].

When is a nosebleed an emergency?

Get emergency care if a nosebleed doesn't stop after 20 minutes or follows a head injury [13].

Become a patient

If the checklist sounds like you or someone in your family, talk with a doctor. To ask about care with Hemo-Health, start with our intake form or call 636-628-6604. Hemo-Health is a telehealth practice and is not an emergency service.

In an emergency: A bleed in the head, throat or abdomen, or any serious injury, is an emergency: call 911 and tell them you have hemophilia. If you don't have a diagnosis yet, call 911 and describe the bleeding. If you already have a diagnosis, also contact your hemophilia treatment center (HTC).

Sources

1. CDC. Signs and Symptoms of Bleeding Disorders in Women. https://www.cdc.gov/female-blood-disorders/signs-symptoms/index.html. Accessed 2026-10-21.
2. CDC. About Von Willebrand Disease. https://www.cdc.gov/von-willebrand/about/index.html. Accessed 2026-10-21.
3. CDC. Bleeding Disorders in Women and Girls: State of the Science and CDC Collaborative Programs (archived). https://archive.cdc.gov/www_cdc_gov/ncbddd/blooddisorders/women/features/state-of-science-and-cdc-programs.html. Accessed 2026-10-21.
4. CDC. About Hemophilia. https://www.cdc.gov/hemophilia/about/index.html. Accessed 2026-10-21.
5. CDC. Data and Statistics on Hemophilia. https://www.cdc.gov/hemophilia/data-research/index.html. Accessed 2026-10-21.
6. MedlinePlus (National Library of Medicine). Hemophilia A. https://medlineplus.gov/ency/article/000538.htm. Accessed 2026-10-21.
7. National Heart, Lung, and Blood Institute (NHLBI). Bleeding Disorders: Symptoms. https://www.nhlbi.nih.gov/health/bleeding-disorders/symptoms. Accessed 2026-10-21.
8. National Heart, Lung, and Blood Institute (NHLBI). Bleeding Disorders: Diagnosis. https://www.nhlbi.nih.gov/health/bleeding-disorders/diagnosis. Accessed 2026-10-21.
9. National Bleeding Disorders Foundation (NBDF). Hemophilia A. https://www.bleeding.org/bleeding-disorders-a-z/types/hemophilia-a. Accessed 2026-10-21.
10. National Bleeding Disorders Foundation (NBDF). Von Willebrand Disease. https://www.bleeding.org/bleeding-disorders-a-z/types/von-willebrand-disease. Accessed 2026-10-21.
11. MedlinePlus (National Library of Medicine). Bleeding. https://medlineplus.gov/ency/article/000045.htm. Accessed 2026-10-21.
12. MedlinePlus (National Library of Medicine). Bruises. https://medlineplus.gov/bruises.html. Accessed 2026-10-21.
13. MedlinePlus (National Library of Medicine). Nosebleed. https://medlineplus.gov/ency/article/003106.htm. Accessed 2026-10-21.
14. National Heart, Lung, and Blood Institute (NHLBI). Bleeding Disorders: What Are Bleeding Disorders? https://www.nhlbi.nih.gov/health/bleeding-disorders. Accessed 2026-10-21.