Ringworm is not caused by a worm. It is caused by a fungus. The kinds of fungi that cause ringworm live and spread on the top layer of the skin and on the hair. They grow best in warm, moist areas, such as locker rooms , in swimming pools and skin folds.
Ringworm is contagious. It spreads when you have skin-to-skin contact with a person or animal that has it. It can also spread when you share things like towels, clothing, or sports gear.
You can also get ringworm by touching an infected dog or cat, although this form of ringworm is not common.
What are the symptoms?
Ringworm symptoms of the skin usually include a very itchy rash. It often makes a pattern in the shape of a ringworm, but not always. Sometimes it is just a red, itchy rash.
Other forms of fungal infections are jock itch and toenail fungus. Jock itch is a rash in the skin folds of the groin. It may also spread to the inner thighs or buttocks and the rubbing of skin on skin can exacerbate the condition.
Ringworm of the hand looks like athlete’s foot. The skin on the palm of the hand gets thick, dry, and scaly. And skin between the fingers may be moist and have open sores.