Hi thanks for asking question. When treatment with antibiotic done or filariasis infection already occured in lymphatic. So even with best treatment swelling sometime may no reduce completely. Large hydrocele scrotal swelling needed to be treated by surgical excision. Avoid fatty food. With compression bandage try to do movement of affected limb. Take care about not biteing by insect. T prevent secondary infection apply antibiotic cream at abraded area, clean nail and wear comfortable footware. I hope I have solve your query. Thanks