Nail cuticle separation explained

The cuticle helps seal the space between the nail plate and surrounding skin. If the seal is damaged or the nail becomes inflamed, the plate can lift, leaving a visible gap or altered colour. Trauma, repeated wet work, manicures, [Nail Fungus](/conditions/nail-fungus/), and [Nail Psoriasis](/conditions/nail-psoriasis/) can produce overlapping signs, so appearance alone cannot identify the cause.

Keep the nail dry after washing and file only sharp loose edges. Do not push back or cut the cuticle, glue the nail down, or place extensions over the gap. Wear protective gloves for cleaning and avoid picking under the plate. A clinician may examine the nail and take a sample before choosing treatment; [Nail Surgery](/treatments/surgical-dermatology/nail-surgery/) is reserved for selected problems rather than routine separation.

Arrange an appointment if separation spreads, affects more nails, or comes with thickening, debris, persistent discolouration, or discomfort. Seek prompt care for increasing redness, warmth, swelling, pus, or severe pain around the nail. A sudden change after an injury should be assessed if the nail is badly damaged or the finger cannot move normally.

Ask whether the nail needs testing for fungus, whether inflammation is present, and which products or activities to pause. Ask how to protect the exposed area while healthy nail grows forward.