If someone had crabs, does that mean they had an STI?

pubic louseYes. Pubic lice, also known as “crabs” are often spread during sexual activity, but can also be spread by coming in contact with infected sheets, towels, blankets, or clothes. Pubic lice feed on the blood of a human; however, they can live up to 24 hours away from the person. Crabs infect hairy parts of the body, especially around the pubic area, but they can also be found in eyebrow, armpit, mustache, or beard hair. Anyone can get pubic lice. However, people with more sex partners have a greater risk of getting infected with pubic lice.