Hilly Chism says
It's a fungus not a worm, any good drug store anti-fungal will clear it up eventually but it can take some time.
creation75 says
Ringworm is a common fungal infection. It sounds to be a form of worm infestation but it is not from a worm. The reason that is called ring worm is because of the red ring of raised skin that it causes, having a light middle to it. The middle of the ring might appear as a blister, it may ooze, and the skin around it might have a rough textured appearance.
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