NHS get licence to kill..lice.
NYDA kills lice and their eggs by suffocating them, unlike traditional pesticide-based treatments, which poison the lice.
It is estimated that more than 200,000 children in Scotland have head lice at any one time. And parents rarely succeed in getting lice and their eggs out of their children's hair.
Figures show 60 per cent of parents check once a month or less often for signs of head lice and 53 per cent fail to follow treatment instructions properly.
Around 73 per cent fail to seek help with getting rid of lice because of what other people might think.
Tests have proved that, after just one treatment of NYDA, head lice die within one minute while their eggs die within eight hours.
Babs Young, an independent nurse consultant for children and young people's public health, said: "Head lice are not considered to be a high-priority health issue as they do not pose a major public health hazard. But continued infestations can have a long-term social impact on children and families.
"That's why it's so important for parents to have access to quality products, whether free on prescription or over the counter.
"Parents sometimes panic at the sight of lice, feeling disgust and anxiety.
"Younger children are less likely to get emotional about it but they can still suffer - losing days from school, experiencing disturbed sleep patterns and so losing concentration in the daytime.
"Some may experience bullying and exclusion from peer groups.
Older children can react more like adults, often feeling embarrassment and shame.
"School nurses used to be in a position to take responsibility, while these days responsibility lies with parents. But it is the duty of health professionals to support parents by providing quality education, advice and information."
OLD SCHOOL: Lice comb