What should you know about thickened nails on toes?

A fungal nail may become thick, brittle, discoloured, or separated from the bed. Pressure from narrow or tight footwear can cause repeated trauma, especially to a front toe, while a previous impact can permanently alter one nail’s growth. Nail psoriasis may occur with pits, lifting, or skin plaques elsewhere. The same nail can show more than one change, so colour alone cannot confirm the cause.

Trim toenails straight across after they soften, and file sharp edges gently. Choose shoes with enough width and length to avoid pressure at the toes. Keep feet clean and dry, change socks when damp, and do not share clippers. A clinician may take a nail sample before antifungal treatment. Depending on the finding, care can include topical medicine, oral antifungal treatment, or a selected laser-based option; these are not interchangeable for every cause.

Arrange review when thickening persists, affects a single nail without clear trauma, causes shoe pain, or spreads to other nails. Seek prompt care for pus, increasing warmth, marked swelling, bleeding, a changing dark streak, or an ulcer. If you have diabetes, circulation problems, or numbness, get advice before cutting a painful or damaged nail yourself.

Ask whether testing is needed, how footwear may be contributing, which treatment fits the suspected cause, whether medicines interact with your health conditions, and what changes should trigger follow-up.