Inflammation of the blood vessels, or vasculitis, is a medical condition that can thicken or weaken the walls of the blood vessels and reduce the flow of blood. Vasculitis can develop without a known cause or from other medical conditions.
According to Mayo Clinic, blood vessel inflammation can develop from some viral infections, such as hepatitis B and hepatitis C.
Immune system diseases, such as lupus, rheumatoid arthritis and Sjogren's syndrome, can lead to vasculitis.
Blood vessel inflammation can develop as an allergic reaction to a drug that is used by a patient. Patients with vasculitis should inform their doctors of all medications that they take.
Blood cell cancers, such as lymphoma and leukaemia, can cause blood vessels to become inflamed.
People with vasculitis may observe weight loss, fatigue and fever. Joint and muscle pain and feelings of numbness in the body can occur with this disease.