The evaluation of lice begins with a history and physical exam.
Physical findings in someone with lice may include:
- Tiny, hard, white eggs firmly attached to the hair shafts
- Skin redness
Tests are not necessary to make the diagnosis of lice.
Continue to Pediculosis Treatment
- Fournier PE, Ndihokubwayo JB, Guidran J, Kelly PJ, Raoult D. Human pathogens in body and head lice. Emerg Infect Dis. 2002 Dec;8(12):1515-8. 
- Venna S, Fleischer AB Jr, Feldman SR. Scabies and lice: review of the clinical features and management principles. Dermatol Nurs. 2001 Aug;13(4):257-62; quiz 265-6.