Arteritis is an inflammation of the arteries, which can lead to reduced blood flow and damage to the affected tissues. This condition can occur in various forms, such as giant cell arteritis and Takayasu arteritis, each affecting different age groups and parts of the body. Symptoms may include headaches, fever, fatigue, and pain in the affected areas. The exact cause of arteritis is often unknown, but it may be related to autoimmune disorders, infections, or other underlying health issues. Diagnosis typically involves blood tests, imaging studies, and sometimes a biopsy of the affected artery. Early treatment is crucial to prevent complications.