Do I Have Toenail Fungus?

Nail fungus sufferers experience different symptoms

You may have a nail fungal infection, onychomycosis (ŏn'ĭ-kō-mī-kō'sĭs), if one or more of your nails are:

  • Thickened
  • Brittle, crumbly or ragged
  • Distorted in shape
  • Dull, with no luster or shine
  • Dark in color (caused by debris building up under your nail)

Infected nails may also separate from the nail bed, a condition called onycholysis. Some patients may feel pain in the toes or fingertips and detect a slightly foul odor.
Mayo Clinic

See your doctor, a podiatrist, or other medical specialist for a diagnosis.