What are Fungal Nail Infections?
Fungal nail infection (onychomycosis) is one of the most common nail conditions, affecting up to 10% of the population. The infection causes nails to become thickened, discoloured, brittle, and sometimes painful.
Fungal infections are caused by dermatophyte fungi that thrive in warm, moist environments. They can spread between toenails and to other people. Left untreated, the infection typically worsens over time and can become uncomfortable when wearing shoes.
Common Symptoms
- Thickened, crumbly, or brittle nails
- Yellow, brown, or white discolouration
- Nails separating from the nail bed
- Distorted nail shape
- Foul odour from affected nails
- Debris build-up under the nail
- Pain when wearing shoes
Common Causes
- Dermatophyte fungal infection
- Walking barefoot in communal areas (pools, gyms)
- Excessive foot perspiration
- Minor nail or skin injuries
- Poor peripheral circulation
- Diabetes or weakened immune system
- Athlete's foot (can spread to nails)
How We Treat Fungal Nail Infections
We accurately diagnose fungal nail infections and distinguish them from other conditions that look similar. Treatment depends on the severity and your health. We create a personalised plan that may include topical treatments, nail reduction, and guidance on preventing recurrence.
Clinical Diagnosis
Nail Reduction & Debridement
Topical Antifungal Treatment
GP Referral for Oral Treatment
Ready to get fungal nail infections treated?
When to Seek Professional Help
- Nail is becoming thicker and harder to trim
- Noticeable colour change in one or more nails
- Nail is crumbling, splitting, or separating from the bed
- Pain or discomfort when wearing shoes
- You have diabetes and suspect a nail infection
- Over-the-counter treatments haven't worked
Frequently Asked Questions
Common questions about Fungal Nail Infections at Lower Limb Clinic.
Clinically reviewed by Paul McMullan, BSc(Hons) MSc FRCPSGlasg MRCPod
BSc (Hons) Podiatry · MSc Podiatric Sports Medicine (QMUL) · FRCPSGlasg · MRCPod
Lead Podiatrist & Clinical Director, Lower Limb Clinic Belfast