Do head lice fight each other?

Yes, infact Head lice do fight each other. As with many species Head Lice or "Pediculosis capitis" adapt a heirachy system and the alpha Lice becomes the predominant leader of ones community, breeding rights are reserved for the dominant male and the position is often contested. Head Lice have developed over there existantce a unique fighting style. The style nick named "Death Fingers" originated high in the mountains of Barvaria and consists of two opponents, a mix of wit and brawn decisive finger movements are preformed to ultimatley paralyze the opponent. The fight is to the death in most occasions.