Treating Toenail Fungus with Laser Therapy

October 18, 2026

A person's feet standing on brown upholstery

Toenail fungus is notoriously stubborn. What may begin as a small white or yellow spot can gradually develop into thickened, discolored, brittle nails that are difficult to manage. For some people, the condition becomes a recurring frustration, particularly when over-the-counter treatments fail to deliver noticeable improvement.

Known medically as onychomycosis, toenail fungus affects both the appearance and health of the nail. While prescription antifungal medications remain an established treatment option, laser technology offers another approach worth considering. Dr. Krista Archer offers laser treatment for toenail fungus using the Alma Harmony XL Pro platform at Well Arched in Carroll Gardens, Brooklyn, where this particular treatment is exclusively available.

Why Is Toenail Fungus So Difficult to Treat?

Unlike many superficial skin infections, toenail fungus develops within or beneath the nail plate. The nail itself creates a protective barrier, making it difficult for certain topical medications to reach the organisms responsible for the infection.

Toenails also grow slowly, meaning that even after an infection has been successfully treated, visible improvement can take months. A healthier-looking nail must gradually replace the damaged portion as it grows.

Other factors, including repeated exposure to moisture, footwear environments, nail trauma, and certain underlying health conditions, can contribute to persistent or recurring infections.

How Does Laser Therapy Work for Toenail Fungus?

Laser therapy uses concentrated light energy delivered through the nail plate to produce a controlled effect in the targeted tissue. Depending on the wavelength and treatment settings, this energy may generate heat that can interfere with fungal organisms or their surrounding environment.

The Alma Harmony XL Pro is a versatile laser platform with multiple treatment capabilities. When configured with an appropriate laser handpiece and protocol, it can be used as part of a professional approach to fungal nail care.

Unlike oral antifungal medications, which circulate throughout the body, laser treatment delivers energy locally to the affected nail. However, local treatment does not necessarily mean greater effectiveness, and results depend on factors including the laser technology used, the severity of infection, and the treatment protocol.

What Can You Expect During Treatment?

Laser treatment for toenail fungus is generally performed in an outpatient setting. At Well Arched in Brooklyn, Dr. Archer evaluates the affected nails and determines whether laser therapy is an appropriate option based on the patient's condition and medical history.

During treatment, laser energy is delivered to the affected nails using the appropriate Harmony XL Pro applicator. Patients may experience a warming sensation, and the duration of the appointment depends on the number of nails involved and the extent of the condition.

Multiple sessions may be recommended, and follow-up appointments help determine whether additional treatment or a combination of therapies is appropriate. Because toenails grow slowly, visible improvement is gradual, often taking several months as healthier nail growth replaces the damaged portion.

What Does Clinical Research Say About Laser Treatment?

Laser therapy for onychomycosis has been investigated in clinical trials and systematic reviews, with encouraging findings in some studies. However, results vary considerably depending on the laser system, treatment protocol, severity of infection, and how researchers define successful treatment.

A systematic review and meta-analysis published in 2024 examined laser therapy in comparison with conventional treatments, including oral terbinafine. The researchers reported promising outcomes for laser-based approaches, while emphasizing the need for larger, well-designed clinical trials before laser therapy can be considered an established alternative to conventional antifungal treatment.

Another systematic review and meta-analysis evaluated 35 studies involving 1,723 patients and 4,278 infected nails. The researchers reported a pooled mycological cure rate of approximately 63%, although outcomes differed by laser type and study design. These findings suggest potential benefits, but the pooled figure should not be interpreted as the expected success rate for any individual patient or laser platform.

More specifically, a 2024 prospective study published in Mycoses evaluated the Harmony XL Pro using a 1064-nm Nd:YAG laser protocol. Among 31 patients, 12.9% achieved mycological cure and 32.3% demonstrated visible improvement at the three-month post-treatment assessment. The findings suggest potential benefits, particularly for selected patients with milder disease, while underscoring the limitations of laser treatment as a standalone approach.

Importantly, not all clinical studies have demonstrated significant benefits. Some randomized controlled trials have found that Nd:YAG laser therapy did not outperform sham treatment in achieving complete fungal clearance. This is why laser treatment should be discussed as a potential option rather than a guaranteed cure.

Is Laser Treatment Better Than Antifungal Medication?

There is no single treatment that is appropriate for every case of toenail fungus. Prescription oral antifungals, particularly terbinafine, remain among the most effective established treatments for many dermatophyte nail infections. Topical prescription medications may be considered for milder infections or when oral medication is unsuitable.

Laser therapy offers a different approach that may appeal to patients who cannot take certain oral medications or prefer to explore a procedure-based option. However, current evidence does not consistently demonstrate that laser treatment is more effective than established antifungal medications.

It is also important to distinguish between improving the appearance of an affected nail and eliminating the underlying fungal infection. FDA clearance for certain nail laser devices relates to temporarily increasing the amount of clear nail, not necessarily achieving a fungal cure.

Who Might Be a Candidate for Laser Therapy?

Patients with discolored, thickened, brittle, or otherwise abnormal toenails may benefit from a podiatric evaluation to determine whether a fungal infection is present. Not every abnormal nail is caused by fungus. Repeated trauma, psoriasis, and other conditions can produce similar changes.

When onychomycosis is confirmed, treatment recommendations depend on the severity of infection, the number of nails involved, previous treatments, medical history, and individual preferences.

For some patients, laser therapy may be considered alongside other approaches, including prescription antifungal medications, professional nail care, or nail debridement. Dr. Archer offers Harmony XL Pro laser treatment for eligible patients exclusively at Well Arched in Brooklyn, with recommendations tailored to each individual's clinical needs.

Can Toenail Fungus Come Back After Treatment?

Even after successful treatment, toenail fungus can return. Fungal organisms thrive in warm, moist environments, and repeated exposure can contribute to reinfection.

Preventative measures include keeping feet clean and dry, changing socks regularly, allowing shoes to dry between uses, and wearing protective footwear in shared showers or locker rooms. Treating an accompanying fungal skin infection, such as athlete's foot, can also help reduce the risk of recurrence.

Long-term nail health involves more than treating the visible changes. It also requires identifying contributing factors and maintaining habits that help protect against future infections.

The Takeaway

Toenail fungus can be persistent, but patients have several treatment options available. The Alma Harmony XL Pro represents one of the laser technologies being studied and used for fungal nail concerns, with clinical research demonstrating some potential for improving nail appearance and, in selected cases, achieving fungal clearance.

The evidence remains mixed, and successful treatment begins with an accurate diagnosis and realistic expectations. Dr. Krista Archer takes an individualized approach to nail health, evaluating each patient's condition and discussing appropriate treatment options based on their clinical needs.

For patients interested in laser therapy for toenail fungus, Dr. Archer offers Harmony XL Pro treatments exclusively at Well Arched in Carroll Gardens, Brooklyn. A consultation can help determine whether laser therapy or another treatment approach is most appropriate.

Frequently Asked Questions

Does laser treatment cure toenail fungus?

Laser therapy may improve the appearance of affected nails, and some clinical studies have reported fungal clearance. However, results vary, and there is not enough consistent evidence to guarantee a cure or establish laser therapy as superior to conventional antifungal medication.

Is laser treatment for toenail fungus painful?

Patients may experience warmth or discomfort during treatment. The sensation varies depending on the laser settings and individual sensitivity. Some patients experience more substantial discomfort, so laser treatment should not be described as universally painless.

How many laser treatments will I need?

The number of sessions depends on the treatment protocol, severity of the infection, and individual response. Some protocols involve multiple appointments over several weeks or months. Dr. Archer can discuss the recommended approach following an evaluation at Well Arched in Brooklyn.

How long does it take to see results?

Toenails grow slowly, so visible changes may take several months. Even after the underlying infection has been addressed, the damaged nail must gradually grow out before its appearance can fully improve.

Can laser therapy be combined with antifungal medications?

Laser treatment may be considered alongside topical or oral antifungal therapy in selected cases. Research continues to investigate whether combination treatments offer better outcomes than individual approaches.

Where does Dr. Krista Archer offer laser treatment for toenail fungus?

Dr. Archer offers Harmony XL Pro laser treatment for toenail fungus exclusively at Well Arched in Carroll Gardens, Brooklyn. Patients can schedule a consultation to determine whether laser therapy is appropriate for their condition.