I tested positive p-anca in November 2013. Retested again, and test has come back negative from lab. I don't know what to do now! I have all symptoms of vasculitis small vessels but would say that symptoms are mild but doctor is dismissing this due to negative result. I have just had an endoscopy which confirms gastritis. I have an appointment on Monday with doctor as I have complained on how my test results have been done and handled. Could I still have vasculitis with a follow up negative result? I want something to stop my legs tingling and my feet burning. I am so tired with livedo with red spots on legs, arms and shoulders, these spots do not go away, they die down and flare again. I have been on antihistamine (fexofenadine) for the last 8 years with no reason why. I have chronic sinusitis and constant nasal drip. Could I still have vasculitis? Any help appreciated.