Tinea is a skin infection caused by a fungus. Tinea can also be referred to as ringworm. This is because it might generate ring-shaped red areas on the skin. Worms, though, are not to blame. Different forms of fungi are to blame. Tinea can spread to any portion of the body. It is especially common near hair and in moist parts of the body. The fungus can be passed from one person to another.