Fungal Nail Infection Fungal nail infection (Onychomycosis) causes nail discolouration and thickening. The nail may appear white, black or yellow If untreated the fungal infection can spread to adjoining nails and lead to other foot problems. Treatment of a fungal nail infection can be difficult as the infection is embedded within the nail and is difficult to reach. A number of other nail conditions may resemble a fungal nail infection. Therefore, its important to get a correct diagnosis before commencing any treatments. Our podiatrists are fully trained to evaluate and diagnose fungal nails, we specialise in the treatment of fungal nail infections. Who is at risk of Fungal Nail Infections?