Hello Jaya Naresh, I understand your grandfather s problem. He has swelling of the legs from the blockage of his lymph vessels and this can lead to oozing of lymph if there is any scratch or abrasion. This problem is produced by the dead worms in his lymphatic system especially in the lymph nodes. His fever can be due to two reasons. If he has an infection of his leg or if he has microfilaria in the blood. A night blood sample examined for micrfilaria may show it if it is present and then it should be treated with the medicine Diethylcarbamazine ( Hetrazan). If there is infection of the leg abrasion or ulceration he would require local and systemic antibiotics. The important way to avoid infection is to keep the legs clean and take care that he walks around only with protective footwear and to wash the legs everyday with water and mild disinfectant. Also please check whether he suffers from diabetes which will increase his chance of infection. If he is in good health surgical removal of the swelling can also be considered, for which you can consult a surgeon. If you have further queries, I am ready to answer them. Best wishes, Dr. Noble Zachariah