Is the treatment of vasculitis requires frequent blood tests?

Often. Systemic vasculitis is often severe and life-threatening. It requires aggressive therapy with medications that themselves can have significant side effects. Both the disease and the meds used to treat it require frequent monitoring with blood tests and other types of tests.

Related Questions

I had 2 blood tests for vasculitis and they came out negative, but I still have similar vasculitis rashes in my fingers and toes. Can I rule it out?

Need more info. Vasculitis is caused by inflammation of blood vessels. The primary diagnostic criteria include signs, symptoms, and tissue sample showing blood vessel inflamation in the form of biopsy. There are some blood tests which support the possibility of vasculitis. However these tests such as anca, are never diagnostic by themselves. There are vasculitis mimics such as thrombotic (blood clot) diseases. Read more...
Need more info. You don't describe the rashes. There are rashes that are compatible with vasculitis (inflammation of blood vessels), but have other causes. As you mention having those rashes on your fingers and toes and without a picture or more data, the lesions may be associated with diseases that will not lead to the development of the typical anca, already mentioned by my colleague. Read more...