Horner syndrome

Overview

A neck artery tear or lung tumor can be the cause.

Horner syndrome comes from a problem anywhere along a nerve path from the brain down the neck into the chest and back to the eye.

In children, it can be from birth injury or, rarely, a tumor.

Symptoms

Common signs:

• Droopy eyelid with small pupil
• Watery eye or droopy eyelid on the same side

Less common

• Less sweating on one side

Look up a symptom: Watery eye or droopy eyelid on the same side

When to get medical care

Causes

Nerve damage.

Does it spread or run in families?

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

Diagnosis

A clinician asks about your symptoms and may order tests.

The exam

A physical exam.

Tests

Tests, if needed:

• MRI:

Treatment

Treatment depends on the cause and how severe it is.

Self-care

• Get imaging to find the cause

Which doctor treats this

• Start with your primary care provider (family doctor or internist).
• They may send you to a neurologist (brain and nerve doctor).

Living with it

Support groups and helplines

• Genetic and Rare Diseases Information Center (GARD): Free NIH information on rare diseases, including where to find experts and patient groups.
• National Organization for Rare Disorders (NORD): Patient groups, help finding care, and aid programs for rare diseases.

Children, pregnancy, and older adults

• Children: Needs evaluation.

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.

Outlook

Treatment depends on the cause.

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 this?
• 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 Horner syndrome