A fungal nail infection, also known as onychomycosis, occurs when fungi infect the nail or the skin beneath it. It commonly affects toenails but can also appear on fingernails. The infection develops gradually and can cause the nail to become thick, discoloured, brittle, and sometimes painful. Warm, moist environments—such as sweaty shoes or communal showers—encourage fungal growth and make infections more likely.
Early signs of a fungal nail infection include small white or yellow spots under the tip of the nail. Over time, the nail may become darker, crumbly, and distorted in shape. In some cases, the nail can separate from the nail bed or emit a slight odour. Although not usually serious, the condition can be uncomfortable and affect confidence, particularly when visible.
Fungal nail infections are caused by various types of fungi, most commonly dermatophytes, which thrive in warm, damp conditions. They can spread from person to person through direct contact or contaminated surfaces. People who frequently wear closed shoes, have sweaty feet, or use communal facilities like gyms and swimming pools are at higher risk.
Certain factors increase susceptibility, including poor foot hygiene, nail trauma, or pre-existing skin conditions like athlete’s foot. Older adults and individuals with diabetes or weakened immune systems are also more prone to infection due to slower nail growth and reduced circulation.
Good foot care can help prevent fungal nail infections. Keeping nails trimmed, dry, and clean, wearing breathable footwear, and changing socks daily are simple but effective steps. Avoiding the sharing of nail tools or footwear and using protective footwear in communal areas further reduces risk.
While fungal nail infections can be stubborn, maintaining consistent hygiene and seeking professional advice can help manage and clear them over time. Early attention prevents the infection from spreading to other nails or people.
