Just in time for kids to go back to school comes a report that 98% of head lice are now immune to most popular treatments. Lice feed from the blood of kid’s heads.

It seems mutations are turning the pests into ‘super lice’ which cannot be killed by many over-the-counter remedies. The report comes from Peyton Manning Children's Hospital in Indianapolis and they are telling parents to ask their doctor for other treatments.

To measure the scale of gene mutation in lice, researchers collected pests between July 2013 and May 2015 from 138 collection sites in 48 states. The problem has been fueled by the fact that 69 per cent of people overuse products to combat head lice. The more common treatments are used the more lice build up resistance.

Though they do not spread infections, they are incredibly difficult to get rid of. Lice lay eggs on their home scalp, which hatch within about a week. Once hatched, they can often be hard to spot as they are yellow or brown - the color of many hair types. The clearest indication of a child having lice is that they scratch their head.