A Communicable Fungus
Ringworm is a skin condition. Though it can appear in many areas, including your nails, it is also commonly found on the scalp. It also causes "athlete's foot" and the infamous "jock itch." Contrary to its name, ringworm does not come from an actual worm.
How It is Transmitted
Ringworm is spread if an infected person or animal touches you. It can also be spread if you touch something that the infected person or animal has had contact with. Cats are the more likely animal to carry and transmit ringworm. Signals that you have ringworm include: discolored nails; red, blistery scalp accompanied by bald patches; and lighter or darker skin.
How to Prevent and Treat Ringworm
Avoid walking barefoot on shared shower floors such as those at gyms and public pools. Do not share brushes or combs. Wash clothing you've just bought. Wash bed linens regularly. To treat ringworm you must see a doctor so that he or she can prescribe a fungus-killing medicine. It can come as a pill or cream. Note that you must take all the medication, even if it clears up before you are finished; otherwise, ringworm can return.