A scabies infection begins as
small, itchy
bumps, blisters, or pus-filled
bumps that break when scratched. Itchy
skin may become thick, scaly, scabbed, and crisscrossed with scratch marks. The itching is due to a hypersensitivity reaction to the mite and/or its feces and eggs.
The areas of the body most commonly affected by scabies are the hands and feet (especially the webs of skin between the fingers and toes), the inner part of the wrists, and the folds under the arms.