Nail Fungus

Nail fungus, medically known as onychomycosis, is one of the most common nail conditions treated by podiatrists. It affects millions of people worldwide and can cause discoloured, thickened, brittle, or distorted toenails if left untreated.

At Advance Foot Clinic, we regularly help patients manage fungal nail infections through professional assessment, education, and evidence-based treatment options. While nail fungus is often considered a cosmetic concern, severe cases can lead to discomfort, permanent damage to the nail, and other foot problems if not properly managed.

Podiatrist holding a toenail with a fungal infection Fungal Nails

What are fungal nails?

Fungal nail infections occur when fungi invade the nail plate, nail bed, or surrounding skin. The fungi feed on keratin, the protein that makes up your nails, causing changes to the appearance and structure of the affected nail.

A fungal infection may affect one nail or multiple toenails. Over time, the nail may become:

  • Yellow, white, or brown in colour
  • Thickened or distorted
  • Brittle or crumbly
  • Separated from the nail bed
  • Difficult to trim with nail clippers
  • Associated with debris beneath the nail

Fungal nails most commonly affect the toenails, as fungi thrive in the warm, moist environments often found inside shoes and socks.

Types of nail fungus

There are several different types of fungal nail infections.

White superficial onychomycosis

This type often appears as a white powdery discolouration on the surface of the nail. Small pits may develop as the infection progresses.

Distal-lateral subungual onychomycosis

One of the most common forms of toenail fungus. It typically starts at the edge of the nail and causes white, yellow, or brown discolouration, along with debris beneath the nail.

Distal onychomycosis

Similar to distal-lateral infections but more concentrated toward the centre of the nail tip. Separation of the nail from the nail bed is common.

Proximal subungual onychomycosis

This form begins near the cuticle and may be associated with trauma or damage to the nail fold. White or yellow discolouration develops near the base of the nail.

Total dystrophic onychomycosis

Often the final stage of a long-standing fungal nail infection. The entire nail becomes thickened, brittle, crumbly, and severely damaged.

How do fungal nails start?

Fungal nail infections occur when fungal organisms enter the nail through tiny cracks, trauma, or damaged skin around the nail.

Common causes and contributing factors include:

  • Nail injury or trauma
  • Walking barefoot in communal areas
  • Public swimming pools
  • Locker rooms and public showers
  • Excessive sweating
  • Poor foot hygiene
  • Wearing tight or non-breathable shoes
  • Wet shoes and damp socks
  • Untreated athlete’s foot

Fungi thrive in warm, moist environments. Once fungal cells enter the nail, they can spread beneath the nail plate and into the nail bed, making the infection difficult to treat without professional care.

Podiatrist Angela Holland doing a laser treatment on a patient with fungal toenails

Symptoms of toenail fungus

Symptoms vary depending on the severity of the infection but may include:

  • White discolouration
  • Yellow or brown nails
  • Thickened nails
  • Brittle or crumbly nails
  • Debris beneath the nail
  • Separation from the nail bed
  • Distorted nail shape
  • Multiple affected toenails
  • Nails that become difficult to cut
  • Occasionally discomfort when wearing shoes

Early diagnosis can help prevent fungal growth from spreading and causing more extensive nail damage.

Who’s more likely to get fungal nails?

Although fungal nail infections can affect people of any age, some individuals are at greater risk.

Risk factors include:

  • Older age
  • Diabetes
  • Poor circulation
  • A weakened immune system
  • Cancer treatments
  • Rheumatoid arthritis
  • Psoriasis or eczema
  • Excessive sweating
  • Frequent use of swimming pools or communal facilities
  • Repeated nail injury
  • Existing athlete’s foot infections

Health conditions that affect blood flow can make it harder for the body to fight infection and support healthy nail growth.

Tips to prevent fungal nail infections

Good foot hygiene plays an important role in helping prevent fungal nail infections.

We recommend:

  • Keeping your feet clean and dry
  • Wearing clean socks daily
  • Choosing moisture-wicking socks
  • Allowing shoes to dry thoroughly between uses
  • Avoiding walking barefoot in communal areas
  • Wearing footwear around swimming pools and locker rooms
  • Trimming nails straight across
  • Not sharing nail clippers
  • Treating athlete’s foot promptly
  • Regularly checking your feet for changes

These simple habits can help reduce the risk of fungal infection and support overall foot health.

Image of inflamed ingrown toenail looking red and sore

Fungal nail treatment options

The best treatment depends on the severity of the infection, the number of nails involved, your overall health, and your treatment goals.

Topical treatments

Antifungal lacquers, creams, and solutions may be recommended for mild infections. These treatments often require long-term use and can be less effective when the infection extends deep into the nail.

Oral medications

Prescription oral medications may be suitable for some patients and can be effective in certain cases. However, they may not be appropriate for everyone due to potential side effects, health conditions, or drug interactions.

Laser therapy

At Advance Foot Clinic, we offer advanced Bost FlexiPulse laser therapy as a non-invasive treatment option for fungal nail infections.

Unlike topical treatments, laser therapy can penetrate the nail plate and target the fungal infection within the nail bed. The treatment is pain-free, requires no downtime, and may be suitable for patients who cannot take oral medications.

Close up of podiatrist holding ingrown toenail, about to treat it

Diagnosis and aftercare

Not every thickened or discoloured nail is caused by fungus. Conditions such as nail trauma, psoriasis, bacterial infection, and other nail conditions can sometimes look similar.

This is why professional assessment is important.

Our podiatrists will:

  • Assess the affected nail
  • Review your symptoms and medical history
  • Determine the likely cause of the infection
  • Recommend appropriate treatment options
  • Provide advice on preventing reinfection

After treatment, ongoing foot care and good hygiene are essential for maintaining healthy nails and supporting long-term results.

Will it come back?

Unfortunately, fungal nail infections can return.

Reinfection can occur if fungal spores remain in shoes, socks, or the surrounding environment. Continued exposure to the factors that caused the infection initially can also increase the risk of recurrence.

To reduce the likelihood of fungal nails returning, we recommend:

  • Replacing or sanitising old footwear where appropriate
  • Wearing clean socks daily
  • Maintaining good foot hygiene
  • Treating athlete’s foot promptly
  • Following your podiatrist’s aftercare recommendations

With proper care and ongoing prevention strategies, many patients successfully manage their condition and maintain healthier nails over the long term.

Podiatrist holding a toenail with a fungal infection Fungal Nails

Take the First Step Toward Happy and Healthy Feet

If you’ve been hiding your toenails, now’s the time to take action. Whether it’s your first infection or a recurring issue, our friendly podiatry team is here to help.

Book your appointment online or call 1300 76 33 66 today to experience our expert podiatry services at any of our five clinic locations.