Fungal nail infections usually affect your toenails, but you can get them on your fingernails, too.
Speak to a pharmacist if the look of your nail bothers you or it's painful.
They may suggest:
The infection is cured when you see healthy nail growing back at the base.
Your GP can prescribe antifungal tablets. You'll need to take these every day for up to 6 months.
Tablets can have side effects, including:
You cannot take antifungal tablets if you're pregnant or have certain conditions. They can damage your liver.
Badly infected nails sometimes need to be removed. It's a small procedure done while the area is numbed (under local anaesthetic).
Fungal nail infections develop when your feet are constantly warm and damp.
You're more likely to get an infection if you wear trainers for a long time and have hot, sweaty feet.
To prevent fungal nail infections:
treat athlete's foot as soon as possible to avoid it spreading to nails
keep your feet clean and dry
wear clean socks every day
wear flip-flops in showers at the gym or pool
throw out old shoes
do not wear shoes that make your feet hot and sweaty
do not share towels
do not wear other people's shoes
do not share nail clippers or scissors