Although no serious complications will result from untreated crabs, they are annoying and can be spread to others. Only specific medicated lotions or shampoos can be used to treat crab lice. They are available without a prescription at most drug stores. The instructions for their use are included in the package. These instructions should be followed carefully.
Medications can be toxic and can irritate the skin.
They should not be used more often than the directions indicate. After treatment, a fine toothed comb can be used to remove the nits. At the time of treatment, all recently used bedding, towels and underclothing should be washed in hot soapy water. If desired, mattresses and upholstery can be vacuumed or sprayed with a household disinfectant. Anyone who has intimate contact or shared a bed, personal towels or clothing with an infected person should undergo the same treatment at the same time.