Fungal nail infection is a very common problem, affecting around three in every 100 people in the UK.
Around half of all nail problems are due to a fungal infection.
Fungal nail infection is about four times more common in toenails than fingernails and can involve part or all of the nail, including the nail plate, nail bed and root of the nail.
Who is affected
Fungal nail infection usually affects adults, and men more than women. It becomes more common as you get older.
Types of fungi
Several types of fungus cause nail infections. For example, athlete's foot is a fungal skin infection of the toes that easily spreads to the toenails; and candida is a yeast that can cause an infection of the skin around the nails (usually the fingernails).
Outlook
Fungal nail infection usually looks unpleasant, but it does not always cause pain or any other symptoms.
The nail infection can be treated and usually cured, but treatment can take several months (see Treatment for more information).
Looking after your nails properly can stop the infection returning.
