The most terrifying case of head lice ever.

A toe-curling video showing a man's hairline crawling with thousands of head lice has been posted online.
The footage, which has no doubt been causing parents of school-age children to reach for a comb, demonstrates what happens if an infestation is left untreated. The unidentified man's hair seems to be alive as the bacteria-covered bugs climb through it. Dee Wright, founder of London-based Hairforce which offers a specialised ‘Lice Assasins’ service, said: 'That's a very extreme case. He will have them in his eyebrows and his eyelashes - they will be falling down.' That person's scalp will be raw in places and infected. That will be running his system down like crazy.' It's a major job to get that out. It's enough to make anyone feel itchy all over.' Ms Wright said she has seen worse cases in the past and has even found whole nests inside her clients' hair.' It's incredibly uncomfortable,' she added. 'They are feeding off the blood of the host. You would be surprised how fast it proliferates.'