But many in the beauty business insist the procedures are perfectly safe. Cosmetologists at Eye Candy SF, a well-respected salon in San Francisco, have been tinting lashes and brows for several years.

Jennifer Grajeda, 40, from Chicago, was left looking like "The Lion King" villain "Scar" after suffering an allergic reaction to semi-permanent dye during an impromptu eyebrow tinting procedure.

Before and after tinting fair eyebrows How much does eyebrow tinting cost? The cost depends entirely on where you get it done. Prices can vary from as little as £10 at some salons to around £30 ...

Harleigh, 17, went for an eyebrow wax and tint treatment but said the procedure was done incorrectly and she ended up in hospital after her throat and face swelled up. "I actually thought at one ...