The itchiness, irritation, and the incessant scratching caused by the small bugs on your scalp and hair make head lice a nuisance at best and at worst, well—they’re the worst. Head lice feed on blood ...

Head lice are considered a nuisance — a pest to be evicted from the hair on your head or the head of a loved one with a special comb or shampoo. But there's more to lice than their elimination. These ...