How is gray nail fungus caused?
Disease description:
My nails don't look normal; they have a grayish-yellow color and have become thicker. Could this be onychomycosis (fungal nail infection)? What causes it?
Doctor's answer (1)
Dr. Liu Wenmin
Onychomycosis, medically known as tinea unguium, is a common nail disorder caused by fungal infection. The direct cause of onychomycosis is fungal infection; common causative agents include dermatophytes and Candida species. These fungi proliferate in warm, moist environments and easily invade the keratinized layers of the skin, especially the toenails and fingernails.
Wearing non-breathable shoes and socks for prolonged periods, using shared slippers, towels, or foot basins, and frequenting public swimming pools or bathhouses can all increase the risk of onychomycosis. Wearing high heels in women or pointed-toe shoes in men may also contribute to the development of the condition.
Injuries to the nail caused by physical trauma, as well as pre-existing nail abnormalities, peripheral vascular disease, diabetes, and other conditions, may reduce the nail's resistance and make it more susceptible to fungal invasion, thus leading to onychomycosis.
Individuals with diabetes, circulatory disorders, chronic illnesses, or those undergoing long-term immunosuppressive therapy have relatively weakened immune function and are more susceptible to fungal infections. Practicing good personal hygiene, avoiding contact with sources of infection, and enhancing immunity can help prevent onychomycosis. If symptoms occur, prompt medical attention is recommended.
