> Ringworm is a disease caused by infection of the skin by fungus, appearing as scaly, ring-shaped patches. Fergus Fungal Budge was a wizarding product that was

> Ringworm is a disease caused by infection of the skin by fungus, appearing as scaly, ring-shaped patches. Fergus Fungal Budge was a wizarding product that was used to treat the ringworm disease on the foot. More at Harry Potter Wiki