A high-tech mirror that tells you how ugly you are should come with a mental health warning, campaigners have claimed.

The HiMirror Mini scans owners’ faces to detect flaws and presents them with a detailed analysis of the most unattractive parts of their face.

It displays a percentage result for problem skin areas like wrinkles, fine lines, complexion, dark circles, red spots and pores.

Owners can scan or select moisturising creams they use from a list and keep a daily diary, allowing them to work out if the treatments are having an effect on problem areas. There is an option to buy creams and treatments through the mirror, and the ability to track improvements they make, if any.

The device is a novel evolution from an instrument that has remained largely untouched since the the familiar silverplate design created by German chemist Justus von Liebig in 1835. However, the latest development, which is expected to hit the British high street in September for £239, has raised concerns among campaigners.