What should you know about bruised nail under gel polish?

A knock, tight footwear, or pressure during nail preparation can cause bleeding beneath the nail plate. The resulting bruise may be red, purple, brown, or dark as it changes over time. Gel polish can conceal that progression, while lifting or a gap at the nail edge can trap moisture and irritants.

The colour is only one clue. Throbbing pain suggests pressure or inflammation; a loose nail, drainage, odour, warmth, or swelling raises concern for a complication. A stain in the polish itself may not be a change in the nail, which is why inspection after removal matters.

Have the gel removed gently rather than peeling, scraping, or filing through the natural nail. If removal is painful or the nail is lifting, stop and use a trained professional or clinician. Once uncovered, wash gently, dry thoroughly, and leave the nail free of polish while you watch the colour and attachment.

Avoid pressure on the affected finger or toe and keep any loose edge protected with a light dressing that does not stick to the nail bed. Do not puncture the nail yourself. If pressure relief or nail-bed treatment is needed, a clinician can explain whether [Nail Surgery](/treatments/surgical-dermatology/nail-surgery/) is suitable.

Seek prompt assessment for severe or worsening pain, a nail that is largely detached, bleeding that will not stop, pus, increasing warmth or swelling, fever, or a colour change spreading beyond the nail. After a heavy impact, urgent review is sensible when the digit is bent, numb, or hard to move. Arrange an examination if the mark is unexplained or does not move outward as the nail grows.

Ask whether the nail bed needs examination, whether the colour is consistent with trauma, and how long to avoid gel products. Ask what dressing to use if the nail is loose and which changes should trigger a return visit.