CausesHead lice can't fly or jump, and they're not transmitted by pets. They spread by head-to-head contact or via contact with contaminated personal belongings or home furnishings.
Head-to-head contact
http://www.mayoclinic.com/health/head-lice/DS00953...
Causes Of Head Louse
Not washing hair for a long time
Coming in contact with people infected with head lice
Contamination in school
Head-to-head contact
Body-to-body contact
Close proximity to stored
http://www.iloveindia.com/home-remedies/symptoms-h...