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High pressure inside the skull (brain swelling)

Also called: High intracranial pressure, brain swelling

Pressure inside the skull from swelling, bleeding, tumors, or fluid, causing headache, vomiting, sleepiness, and vision changes.

EmergencyYes

Overview

The skull can't expand, so swelling or bleeding raises pressure on the brain.

It's treated in the ICU.

Symptoms

Common signs:

  • Severe headache with vomiting
  • Very sleepy or confused
  • Seizure

Less common

  • Vision changes

When to get medical care

Call 911Call 911 now for: severe headache with vomiting, very sleepy or confused, seizure.
Get care todayMilder symptoms that could be early signs.
See a doctor soonQuestions about lowering your risk.

Causes

Swelling, bleeding, tumors.

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

  • Head injury

Possible complications

Diagnosis

This is diagnosed in the emergency room or hospital.

The exam

A physical exam.

Tests

Tests, if needed:

  • CT:

Treatment

Emergency care is needed. While waiting for help:

Self-care

  • Call 911

Prevention

To lower your risk or prevent problems:

  • Helmets
  • Seat belts

Which doctor treats this

  • Emergency doctors treat it first, in the ER.
  • They may send you to a neurologist (brain and nerve doctor).

Back to school, work, or sports

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

Children, pregnancy, and older adults

  • People with head injuries: Highest risk.

Pregnancy and breastfeeding

  • If you're pregnant or planning to be, tell your prenatal provider about this condition.
  • 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

Fast treatment improves recovery.

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 follow-up care do I need?
  • How can I prevent this from happening again?

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 High pressure inside the skull (brain swelling)

Sources

Last updated 2026-11-12.