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Blood clot in the lung (pulmonary embolism)

Also called: Pulmonary embolism, PE, blood clot in the lung

A blood clot that travels to the lungs, causing sudden shortness of breath, chest pain worse with breathing, and a fast heartbeat. It's an emergency.

EmergencyCall 911
Often starts asA leg clot
TreatmentBlood thinners

Symptoms

Common signs:

  • Sudden shortness of breath

Less common

  • Chest pain
  • Coughing blood
  • Leg swelling

When to get medical care

Call 911Sudden shortness of breath, chest pain, or coughing blood: call 911.
Get care todayNew or worse symptoms, or symptoms with fever.
See a doctor soonSymptoms that last or keep coming back.

Causes

Clots.

Does it spread or run in families?

  • It isn't contagious. You can't catch it from someone else.

Who is more likely to get it

  • Surgery
  • Long travel
  • Pregnancy

Possible complications

Diagnosis

Hospital tests.

Tests

Tests, if needed:

  • CT scan:

Treatment

Get care.

Medicines

Medicines that may help:

MedicineHelps withGood to know
Blood thinners
Clots

OwieClear doesn't give doses: follow the label or your healthcare professional. Medicine names here are examples, not a full list.

Prevention

To prevent:

  • Move during long trips

Which doctor treats this

  • Emergency doctors treat it first, in the ER.
  • They may send you to a pulmonologist (lung doctor).

Living with it

Support groups and helplines

Back to school, work, or sports

  • Recovery time varies. Ask your care team when you can drive, lift, work, and exercise.

Pregnancy and breastfeeding

  • If you're pregnant or planning to be, tell your prenatal provider about this condition.
  • This condition needs closer checkups during pregnancy. Plan ahead with your doctor.
  • Don't start or stop any medicine on your own. Some are safe in pregnancy and some need to be changed.
  • Ask before taking any pain reliever. The FDA advises avoiding ibuprofen and naproxen after 20 weeks unless your doctor says to.
  • Breastfeeding: Most medicines are fine, but ask. The NIH LactMed database lists what's known about each one.

For caregivers

  • Go to visits when you can and take notes.
  • Keep a list of medicines, allergies, and doctors in one place.
  • Learn the warning signs that need fast care.
  • Learn CPR. Many hospitals and the Red Cross offer classes.
  • Take breaks and ask for help. Caregivers need care too.

Outlook

Treatment saves lives.

Getting ready for your visit

Bring a list of your symptoms and medicines.

What to bring

  • A list of your medicines and supplements
  • Notes on when symptoms started and what makes them better or worse

Questions to ask

  • What's causing my symptoms?
  • What treatment do you recommend?

Research studies

Research studies test new ways to find and treat health problems. Some are looking for volunteers. Talk with your doctor before joining one.

Search ClinicalTrials.gov for studies on Blood clot in the lung (pulmonary embolism)

Sources

Last updated 2026-11-12.