Definition of Temporal arteritis:

Temporal arteritis is inflammation and damage to blood vessels that supply the head area, particularly the large or medium arteries that branch from the neck.

If the inflammation affects the arteries in your neck, upper body and arms, it is called giant cell arteritis.

Causes, incidence, and risk factors:

Temporal, giant cell, and cranial arteritis occurs when there is inflammation and death of one or more arteries. It most commonly occurs in the head, especially in the temporal arteries that branch from the carotid artery of the neck. However, it can be systemic, affecting multiple medium-to-large sized arteries anywhere in the body.

The cause is unknown but is assumed to be, at least in part, an effect of the immune response. The disorder has been associated with severe infections and high doses of antibiotics.

The disorder may develop along with or after polymyalgia rheumatica. Giant cell arteritis is seen almost exclusively in those over 50 years old, but may occasionally occur in younger people. It is rare in people of African descent. There is some evidence that it runs in families.