Topic at a Glance
- Toenail fungus (onychomycosis) is an infection that invades the nail bed, causing it to become brittle and discolored.
- Common causes include damp environments, nail injuries, tight shoes, poor hygiene, and contaminated nail tools.
- Treatments can include oral or topical treatments or laser therapy.
- You can reduce the risk of toenail fungus by keeping your feet dry, wearing breathable footwear, and avoiding barefoot walking in public places.