What should you know about thick crusty toenail?

The crust may be compacted keratin and debris under a thickened nail. Fungal nail disease often changes the nail’s colour and texture, while nail psoriasis may cause lifting, ridging, pitting, or irregular growth. A toe repeatedly pressed by a shoe can become thick and distorted after damage. These appearances overlap, so removing the surface material does not establish the cause or cure the underlying problem.

Wash and dry the foot carefully, trim the nail straight across, and smooth sharp edges with a clean file. Choose footwear that does not press on the nail, and keep personal nail tools separate. Avoid cutting into the surrounding skin, drilling the nail, or using harsh chemicals. A clinician can discuss Nail Fungus, Nail Psoriasis, Oral Antifungal Treatment, or Laser Treatment For Nail Fungus when appropriate after assessment.

Make an appointment if the crust returns, the nail separates, or the change affects more nails. Get prompt care for increasing pain, swelling, warmth, redness, drainage, or difficulty walking. A changing dark streak or unexplained bleeding warrants examination. Arrange early review for any foot problem if you have diabetes, poor circulation, or reduced feeling in the feet.

Is the crust caused by fungus, psoriasis, pressure, or previous injury? Should the nail be sampled or trimmed professionally? Which treatment fits my other medicines and the number of nails involved?