What should you know about brittle discolored nails?

Nails may split, peel, or crumble after frequent wetting and drying, harsh cleaners, picking, biting, or prolonged polish and remover use. Yellow, white, brown, or green colour can have different explanations. A nail fungus can cause altered colour and a thickened or crumbly nail, but colour alone cannot identify the cause. Injury may create a dark mark that should slowly move toward the tip as the nail grows. A clinician may inspect the nail and surrounding skin and, when needed, test a nail sample before treatment.

Keep nails short and file rough edges in one direction. Wear gloves for cleaning or prolonged water exposure, dry carefully under the nail edge, and apply a plain moisturiser to the nails and cuticles. Pause biting, picking, artificial nails, and repeated remover until the cause is clearer. Do not scrape away discolouration or share nail tools. A page about Nail Fungus may help you recognise features that need a professional check.

Arrange a medical review if the colour or texture persists, spreads to other nails, or comes with thickening, lifting, pain, swelling, drainage, or bleeding. Seek prompt care for a new dark streak, pigment reaching the surrounding skin, or a mark that does not grow out with the nail. People with diabetes, reduced immunity, or poor circulation should seek advice sooner for a painful or infected-looking nail.

Ask what causes are most consistent with the colour and pattern, whether a nail sample is useful, and which products or habits could be contributing. Ask how long improvement should take after the cause is treated and which changes should prompt an earlier review.