Pubic lice, often called crab lice, are tiny parasites that feed on blood and live on coarse body hair, usually around the genitals. They can also affect the armpits, chest, beard, eyebrows, or eyelashes. Their eggs attach firmly to individual hairs and may resemble pale or yellowish specks. Itching is common, but some people notice few symptoms. Photographs cannot confirm an infestation: skin conditions and ordinary debris can look similar, making professional examination important.

These parasites usually spread through close physical contact, particularly sexual contact, and less commonly through recently used clothing, towels, or bedding. Anyone can acquire them, regardless of hygiene. Finding lice does not establish infidelity, identify who transmitted them, or reliably show when transmission occurred. A healthcare professional or sexual-health service can confirm the cause and recommend appropriate treatment. Pubic lice are treatable; prompt care and communication with relevant intimate partners can help prevent further spread, without blame or shame.