Vasculitis & Panniculitis. The matter.

My sister has been diagnosed with Vasculitis & Panniculitis in the month of March when she visited doctor for severe swelling and strange red spots and bruises near her anckle areas in both legs. Still after continuing medicine for 2 months, her condition did not improve much. Whenever she stops her medicine, she get high fever and after that swelling and red bruises again. Due to lockdown, she's unable to revisit doctor and continuing her medicine to avoid critical situation. During her last visit, doctor said it's due to development of some bacteria in her body which is growing rapidly and they don't have any proper treatment to curb it from root. Only they can prescribe the medicine to control it from spreading. Please suggest to the matter.