Head lice (Pediculus humanus capitis) are insects living and feeding on blood usually from children heads.
Signs of head lice are itchiness due to an allergy to lice saliva which is inserted to the blood. Also, the insects shown below can be found on children scalps.
Nits -empty lice eggs- can be also found in the head. They are white and usually look like dandruff or head dermatitis, but in constrast to dandruff they are firmly stuck on hair.
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