Toenail Infection

A toenail infection, also known as onychomycosis, is a common fungal infection that affects the toenails. It is caused by a type of fungus that thrives in warm, moist environments and can be spread through direct contact with an infected person or contaminated surfaces.

Causes

The most common causes of toenail infections are:

Symptoms

The symptoms of a toenail infection may include:

  • Thickening or brittleness of the nail
  • Discoloration of the nail, such as yellowing, brownish, or blackening
  • Distortion of the nail shape
  • Pain or tenderness in the nail bed
  • Foul odor from the infected nail
  • Crumbly or flaky texture of the nail
  • Separation of the nail from the nail bed

Types of Toenail Infections

There are several types of toenail infections, including:

  • Dermatophyte infection: caused by a type of fungus that feeds on keratin, a protein found in nails
  • Yeast infection: caused by a type of yeast that thrives in warm, moist environments
  • Mold infection: caused by a type of mold that can infect the nail and surrounding tissue
  • Bacterial infection: caused by bacteria such as pseudomonas or streptococcus

Treatments

The treatment for a toenail infection depends on the severity and type of infection. Some common treatments include:

  • Topical antifungal medications: applied directly to the infected nail
  • Oral antifungal medications: taken by mouth to treat the infection from the inside out
  • Nail debridement: removal of the infected portion of the nail
  • Laser treatment: uses a laser to heat and kill the fungus
  • Surgical removal: removal of the entire infected nail
  • Home remedies: such as tea tree oil, vinegar, and baking soda, which can help to treat mild infections

Prevention

To prevent toenail infections, it is recommended to:

  • Keep the feet clean and dry
  • Wear shoes that fit properly and are made of breathable materials
  • Use antifungal powders or sprays on the feet and in shoes
  • Avoid sharing personal care items, such as nail clippers and files
  • Disinfect nail care tools after each use
  • Wear socks made of moisture-wicking materials

Complications

If left untreated, a toenail infection can lead to complications such as:

  • Spread of the infection to other nails or parts of the body
  • Persistent pain and discomfort
  • Nail loss or damage
  • Infection of the surrounding skin and tissue
  • Systemic infections, such as cellulitis or sepsis, in people with weakened immune systems

Frequently Asked Questions (FAQs)

What is a toenail infection?
A fungal or bacterial infection that affects the toenail, often causing discoloration, thickening, and brittleness.

What causes toenail infections?
Fungi, bacteria, or yeast, typically entering through cracks in the nail or skin.

What are symptoms of a toenail infection?
Discoloration, thickening, brittleness, pain, swelling, and foul odor.

How is a toenail infection diagnosed?
Visual examination, medical history, and possibly lab tests to confirm the presence of fungi or bacteria.

Can toenail infections be treated at home?
Mild cases may be treatable with over-the-counter medications, but severe cases often require medical attention.

What are common treatments for toenail infections?
Topical or oral antifungal medications, nail debridement, or in some cases, surgical removal of the infected nail.

How long does it usually take to recover from a toenail infection?
Recovery time varies, typically several months to a year or more, depending on the severity and treatment.

Can toenail infections be prevented?
Possibly, by practicing good foot hygiene, wearing breathable shoes, and avoiding sharing personal care items.

Are there any complications associated with toenail infections?
If left untreated, potentially leading to spread of infection, permanent nail damage, or secondary bacterial infections.

Can anyone get a toenail infection?
Yes, but certain individuals, such as those with diabetes or compromised immune systems, may be more susceptible.

Article last updated on: 18th October 2025.
If you have any feedback, please get in touch.

See more

 Conditions  Symptoms  Procedures

Diagnosis Pad
Medical AI Assistant with Differentials, Guidance, Transcriptions, Notes, Medical Encyclopedia and Explainable AI.
Download from App Store Download from Google Play
Available for iOS, macOS and Android.

Medical Disclaimer

The information provided is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay seeking it because of something you have read on this site. We we do not guarantee, and assume no legal liability or responsibility for the accuracy, currency, or completeness of the information provided.