Does topical antibiotic therapy treat green nail syndrome?

Green nail syndrome is commonly associated with Pseudomonas bacteria growing where the nail is lifting or repeatedly exposed to moisture. The colour may appear green beneath part of the nail, while the surrounding skin can remain mildly irritated. A topical medicine may be selected because it can reach the affected nail edge or nearby skin, but thickened, detached, or extensively involved nails may need a different plan. A green colour can also reflect staining, trauma, or another nail disorder, so appearance alone cannot confirm the cause.

Book an assessment if the colour is new, spreading, or accompanied by nail lifting. Keep the nail clean and dry, trim only loose edge carefully, and avoid covering it with polish or an artificial nail while it is being evaluated. Wear gloves for prolonged wet work and dry hands thoroughly after washing. Do not dig under the nail or share clippers. If prescribed a topical antibiotic, follow the application instructions and attend review if the nail does not show healthy growth as it grows out.

Seek prompt care for increasing pain, warmth, swelling, pus, or redness extending around the nail. Fever or feeling unwell needs prompt medical attention. Arrange a routine review if several nails change colour, the nail becomes very deformed, or the problem returns after moisture exposure. People with diabetes, poor circulation, or reduced immunity should have a lower threshold for assessment of a painful or infected-looking nail.

Ask whether the colour fits green nail syndrome, whether a sample or nail examination is needed, and how to keep the nail dry during treatment. Ask how long healthy nail growth may take to replace the discoloured portion.