What should you know about yellow nail treatment?

Yellow colour is a visible sign rather than a diagnosis. Nail fungus may cause thickening, crumbling and debris beneath the nail. Nail psoriasis can cause pits, separation or an irregular surface, sometimes with psoriasis elsewhere on the body. Trauma may leave a nail discoloured while it grows out.

A clinician can examine the nail and may test a sample when fungus is suspected. This matters because antifungal treatment will not correct psoriasis or an old injury. Discoloured Nails and Nail Fungus explain common patterns, while Nail Psoriasis covers another important cause.

Protect the nail from repeated pressure, keep it clean and dry, and trim it carefully without tearing or digging underneath. Avoid covering an unexplained change with polish until it has been assessed, because this can make monitoring harder.

When fungus is confirmed, a clinician may discuss a nail-applied medicine or Oral Antifungal Treatment. The choice depends on the nail pattern, other medicines, liver health and personal circumstances. Follow-up helps check growth and response; do not stop or extend treatment without advice.

Seek prompt assessment for a new dark streak, pigment extending onto nearby skin, bleeding, ulceration, severe pain, swelling, pus or rapid nail destruction. Arrange a routine review if yellow colour persists, affects several nails, returns repeatedly or comes with skin rash, joint symptoms or nail separation.

Ask what is causing the colour, whether a nail sample is useful, which treatments are realistic for the affected nail, whether your medicines or health conditions alter the choice, and how progress will be monitored.