It’s a general term for when your blood vessels get inflamed. That may weakened or stretch your blood vessels, or case them to leak, swell, get narrower, or even close off entirely.
Vasculitis can affect people of all ages, but there are types of vasculitis that occur in certain age groups more often than others. Sometimes the condition affects only specific organs, like your skin, eyes, or brain. Other types of vasculitis affect many organ systems at the same time. Some of these generalized forms may be quite mild and may not require treatment. Others may be severe, affecting critical organs.