Signs of Lice

Although the feeding bite of the louse is painless, its saliva can cause an allergic reaction in many people. There can be red marks and itching at the site of the bite.  Reaction severity depends on host sensitivity and number of prior exposures.  An initial infestation may produce no signs or symptoms for 4 to 6 weeks.  Fifty percent of the population are asymptomatic and never itch.

Other symptoms of lice include:

  • Rash at the nape of the neck
  • Swollen glands
  • Low grade fever
  • Bags under the eyes
  • Inability to sleep
  • Anemia in severe case