what is vasculitis?
vasculitis, sometimes called angiitis or arteritis, is an autoimmune disorder that causes inflammation of the blood vessels,
according to webmd. there are a number of forms, most of them rare, which can cause a variety of reactions in the blood vessels: they may stretch, weaken, grow larger, grow more narrow, or close up entirely. in rare cases, it can lead to an aneurysm.
symptoms involve general aches and pains, fever, headache, fatigue and weight loss. there may also be other symptoms more specific to the affected body parts, like digestive issues, hearing loss, loss of vision, swelling or loss of feeling in the hands and feet, trouble breathing, or skin rashes.
experts still don’t understand what exactly causes vasculitis. some types are thought to be genetic, and others may be triggered by certain drugs, infections like hepatitis b or c, blood cancers, or other illnesses of the immune system like lupus or rheumatoid arthritis.
on the show, kutcher told grylls that good health is something “you don’t really appreciate it until it’s gone… until you go, ‘i don’t know if i’m ever going to be able to see again, i don’t know if i’m ever going to be able to hear again, i don’t know if i’m ever going to be able to walk again.'”