It may be misdiagnosed as poison ivy, eczema, allergies or other skin conditions. The blisters break easily when scratched.
Broken blisters leave scratch marks and thickened skin, crisscrossed by grooves and scaling.
Eggs mature into adult mites in 3 weeks. Mites are 0.1mm in diameter and can only be seen under a microscope. Scratching collects mites and eggs under the fingernails, so they spread to other parts of the body. Bathe daily, or at least 2 to 3 times a week. Wash hands before eating.