The worst viral beauty trends on TikTok and why you should avoid them, from sunscreen contouring to microneedling at home

• Gwyneth Paltrow has been criticised by skincare industry insiders for revealing she selectively applies sunscreen on the areas of her face where the sun hits first
• At-home microneedling increases the risk of spreading bacteria from spots, cysts and wounds to your face – if you want the procedure, get it done professionally