No. Vasculitis is often a symptom of an underlying autoimmune disorder. It is not contagious. You should seek the guidence of a rheumatologist to assist with the type of vasculitis you have (I assume it is the one causing palpable purpura) and often times a steroid such as prednisone will stop the rashes.
Vasculitis-induced arthritis occurs when the lining of the joints is affected by vasculitis
Vasculitis can affect arteries
Vasculitis can affect arteries
Vasculitis can affect veins
Vasculitis can lead to aneurysms
Vasculitis can occur very focally
Multiple types of disease are associated with vasculitis. Many autoimmune diseases have vasculitis as one of their complications.
Meningitis can cause Secondary vasculitis
Sclerodactyly can cause Secondary vasculitis
Endocarditis can cause Secondary vasculitis
Pneumonia can cause Secondary vasculitis