Ringworm is a fungal infection of the skin which can be recognized by the raised reddish circular type of border patches on the skin.(sometimes it is asymptomatic ).
Grind a few Neem leaves * and mix an equal quantity of curd in the paste.Apply the mixture over the affected areas for the patches to disappear.
the link below gives another tip for the ring worm infection and the image
* Neem -Vepa in Telugu ,Veppai in Tamil.