Description
Skin fungi not only can disfigure the nails but can also cause physical pain and impair the ability to work. Nail fungi affect toenails four times more often than fingernails. Once fungi take hold, it may spread from nail to nail, foot to foot, and rarely to the hands and fingernails.
When the nails are exposed to a warm moist environment, a fungus can develop on the nail or under its outer edge. This is called onychomycosis. Depending on the type of fungus, the nail may turn yellow, gray, brown, or black. The nail may become brittle and crack. It may separate from its bed. The surrounding skin may be red, itchy or swollen.
There are a number of types of fungal infections.
DSO (distal subungual onychomycosis). This is where the fungus, usually a dermatophyte, invades the space between the tip of the toe and the nail tip or the skinfolds at the sides of the nails. The toenails turn yellow and separate from the nail bed beneath them.
WSO (white superficial onychomycosis). Less common than DSO, this affects only the surface of the nail turning it white and crumbly in spots or all over the nail surface. This is the most easily treated infection in that it can be simply scraped off the nail and a topical antifungal medication applied.
PSO (proximal subungual onychomycosis). This is the least common of nail fungi and may first appear as a white or yellowish spot on the nail close to the cuticle. From there, it can progress into a plaque that collects on the underside of the nail. Then, debris may collect under the nail and it may lift off its bed and even be shed entirely. This infection is usually treated with a systemic drug.
Candida Albicans (yeast infection). This more commonly affects fingernails than toenails. The infection can turn nails yellow or green or the nail may look opaque. This infection can be treated topically.
(Back to Top)
|