RAISED BROW FROWN

WHAT: Frequent eyebrow- raising pushes up the brow muscles causing wrinkles running across the forehead in straight furrows, giving a puzzled look. EXPERT: ‘ The frontalis is a thin, bandlike muscle across the forehead,’ says Dr Mahto. ‘Overuse results in horizontal lines, which can be seen on those in their 20s if it is in constant use.’ SOLUTION: Botulinum toxin (Botox is one brand) injected into the frontalis softens lines by freezing the muscles that create wrinkles (from £195, cadoganclinic. com). Or you could try Time Release Retinol Concentrate by Dr Murad (£65, johnlewis.com) which contains retinol — one of the few ingredients dermatologists deem genuinely effective.