What Is Crabs Disease?
Reviewed: Dr. Gromatzky
3. Symptoms
Symptoms begin approximately five days after coming into contact with the insects and usually begin with intense itching in the infected area. A louse’s saliva contains proteins unrecognized by the human body, and the itching sensation is a result of the immune system launching an attack against them.
A person with crabs also may notice reddish pimples where lice have fed. The pimples then change to 0.2 to 3.0-centimeter black or bluish-gray spots. The immune system may further respond by causing lymph nodes in the area to swell and the body to become feverish. The person may feel lethargic or irritable.
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