What should you know about finger nails lifting from nail bed?

The detached portion may look white because air sits beneath it. It can catch on clothing and collect moisture or debris. A single nail after a knock suggests trauma, while multiple nails or associated scaling may suggest a skin or nail condition. Nail Fungus and Nail Psoriasis are possible explanations, but neither should be assumed from lifting alone. A clinician may inspect the nail, surrounding skin, and any new growth, and may take a sample if infection is suspected.

Keep the nail short and smooth the edge without pulling it away. Keep the finger clean and dry, wear gloves for wet work, and avoid nail extensions, cuticle cutting, and pressure on the affected area. Do not place sharp objects beneath the nail. Treatment depends on the cause; a clinician may recommend a medicine, protection, or, in selected cases, Nail Surgery. The separated part usually cannot be reattached, so care focuses on healthy growth from the base.

Arrange assessment when lifting is unexplained, spreading, recurrent, or accompanied by colour or thickness change. Seek prompt care for severe pain, redness, warmth, swelling, pus, bleeding, fever, or a dark mark that does not grow out. A recent crush injury with significant tenderness also warrants timely review.

Could this be trauma, Nail Fungus, Nail Psoriasis, or another cause? Should the nail be tested? How much should I trim, and would Nail Surgery help or create additional injury?