Onychomycosis is a nail infection (fingernails or toenails) caused by fungus. The fungus can affect any part of the nail plate and the most common nails to be affected are the great toenail or the little toenail. The nail can develop a white or yellow streak that is one sided (lateral Onychomycosis), thickening under the nail plate (subungal hyperkeratosis), lifting of the end of the nail (distal onycholysis). Superficial onychomycosis causes white patches and flaking on the top of the nail. To confirm the diagnosis of onychomycosis a nail culture must be performed by clipping or scraping the affect nails. The treatment of nail fungus requires either topical or oral antifungals however the recurrence rate is significant even with oral antifungals. Therefore, patient’s must be realistic when treating a nail fungus as completely curing them of the infection is difficult. Lasers have been used to treat nail fungus however there effectiveness is very poor. A reason to treat even though results are poor is to control not cure and prevent spreading of fungus to other nails, feet, or groin.