Bug Identifier
Pubic louse
Community identification

Pubic louse

Pthirus pubis

Order & Family
Psocodea: Pthiridae
Size
1.1 to 1.8 millimeters (about the size of a pinhead)
See this bug in the Encyclopedia

Natural Habitat

Human body, primarily in the pubic hair and surrounding coarse hair like armpits and facial hair

Diet & Feeding

Obligate hematophagy (feeds exclusively on human blood several times a day)

Behavior Patterns

Sedentary insects that remain attached to hair shafts; they move slowly and are primarily transmitted through close physical contact, particularly sexual contact

Risks & Benefits

Cause intense itching (pruritus) and reddish/bluish skin lesions; they can cause emotional distress and indicate the possible presence of other STIs, though they do not typically transmit diseases themselves.