The exact cause of sarcoidosis is not known. It is likely due to genes and the environment.

Risk Factors

Things that raise the risk of sarcoidosis are:

  • A family history of the condition
  • Interferon therapy
  • Working in certain jobs, such as:
    • The U.S. Navy
    • Metal working
    • Firefighting
    • Handling building supplies
  • HIV (rare)



Sarcoidosis may not cause symptoms at first. Symptoms that happen depend on the organs involved. Symptoms may be:

  • Lasting cough
  • Problems breathing
  • Swollen lymph nodes
  • Fever or night sweats
  • Weight loss
  • Tiredness
  • Skin bumps or rashes
  • Headache, lightheadedness, or drooping of the face
Bell Palsy
Facial droop and nerves
Copyright © Nucleus Medical Media, Inc.


The doctor will ask about symptoms and past health. A physical exam will be done. The doctor will focus on the affected area.

Images may be taken to view the lungs and lymph nodes. This can be done with

  • Chest x-rays
  • CT scan
  • PET scan

A sample of tissue may be taken and tested—to look for granulomas.

Other tests may be done to see how well organs are working. These may be:

  • Blood and urine tests
  • Eye exam
  • ECG —to test heart health
  • Pulmonary function tests —to test lung health
  • MRI scan —to test nervous system

Diagnosis is often made after other conditions are ruled out.



There is no cure for sarcoidosis. The goal is to manage symptoms. If the condition is mild, treatment may not be needed. If symptoms are severe or could cause damage, options may be:

Medicines, such as:

  • Corticosteroids—to ease inflammation
  • Medicine to lower the immune system
  • Tumor necrosis factor inhibitors—to ease inflammation
  • Antimicrobial drugs—to treat skin problems

Transplant of the heart, lung, liver, or kidneys may be needed if medicine does not help.


There are no guidelines to prevent sarcoidosis.

This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.

Edits to original content made by Denver Health.