Sarcoidosis is a rare condition in which patches of red, swollen tissue (granulomas) form in various parts of the body.
Sarcoidosis affects many organs in the body, with the lungs the most commonly affected. However, it is considered to be a multisystemic condition, as it can affect the skin, eyes, heart, muscles, joints, bones, liver, kidneys and brain. Read more about how these organs can be affected.
Most people with sarcoidosis get better without specific treatment within 12-18 months and go on to lead normal lives. This is because the body's immune system can heal the condition over time.
Sometimes, for reasons that are not understood, the immune system does not heal the granulomas and scar tissue forms (fibrosis). This can result in damage to the affected body part that requires long-term treatment and monitoring.
There are treatments that can help to slow the disease and improve symptoms. However, no treatment is available to cure this condition.