Unlike black widow bites, brown recluse bites aren ... the small itchy bites on your scalp or other skin areas, she says. In addition to the lice and their bites, you might notice lice eggs ...

Sea lice aren't lice at all ... The trouble comes when these babies get caught between your skin and your bathing suit, or even in your hair. About 4-24 hours later, you start to itch and sting.