Fungal infections such as ringworm, yeast infection or athlete's foot occur when a pathogen — an organism causing disease to its host — is exposed to your body and becomes prevalent in one area so that your immune system cannot defeat it. Most fungal infections are common on the skin and nails but can also appear in your mouth, throat, lungs, urinary tract and other parts of the body.

While anyone can get a fungal infection, those with weakened immune systems, poor circulation, or even some pre-existing conditions like diabetes are more susceptible to developing fungal infections. Common symptoms include skin changes, a rash, cracking or peeling skin and itching. It can also cause your skin to look red, swollen or bumpy.