What causes fungal nails?
The infection can be caused by a variety of fungi, including dermatophytes, yeasts, and molds. The most common cause is a group of fungi called dermatophytes. These fungi are found naturally on the skin and nails, and can spread to the nails when the skin is injured or exposed to warm, moist environments. There are a number of factors that can increase the risk of developing fungal nails. Age is one of the most common contributing factors to fungal nails; as people age, nails become thicker and are more likely to be affected by fungi because the nail plate becomes harder and more difficult to penetrate.
Poor hygiene is another major cause of fungal nails. Fungi thrive in moist, warm environments, and if the feet and hands are not cleaned properly, fungi can easily spread to the nails. Those who are frequently exposed to warm, moist environments, such as swimmers, athletes, and health care workers, are also at increased risk.