Skin conditions. Many
skin conditions itch, including dry
skin (xerosis), eczema (dermatitis), psoriasis, scabies, burns, scars, insect bites and hives.
Internal diseases. Itchy skin can be a symptom of an underlying illness. These include liver disease, kidney failure, iron deficiency anemia, thyroid problems and certain cancers, including multiple myeloma and lymphoma.
Nerve disorders.