Fungal nail problems are common, are not usually serious but can look unsightly. Nails may appear yellow / grey, thickened and crumbly. The fungi causing nail problems often live harmlessly on the skin, but can multiply unchecked which leads to infection. Warm, dark and damp places (like feet) provide favourable conditions for the development of fungal infections and prevention is better than cure. Good hygiene is key to ensure the infection doesn’t worsen or spread to others: wash & dry feet carefully; wear fresh socks daily; use shoes which allow the feet to breathe, and avoid walking barefoot in communal areas like the gym or pool. If you have a weakened immune system or health conditions such as diabetes, psoriasis or peripheral arterial disease you may be more at risk. Seek advice from a podiatrist if you are concerned.