This article will discuss what causes pruritus, symptoms, diagnosis, treatment, and prevention.
Pruritus Causes There are many causes of pruritus. A common cause of pruritus is xerosis, especially in older adults and in people who live in colder climates. Other causes include:
Skin conditions such as eczema and psoriasis (an autoimmune skin disorder) Allergic contact dermatitis from exposure to nickel, poison ivy, latex, laundry detergents/soaps, and other irritants Viral infections such as human immunodeficiency virus (HIV), herpes zoster (shingles), viral hepatitis Bacterial infections such as folliculitis (infection of the hair follicles) Parasitic infestation such as scabies Insect bites Diabetes Blood cell cancer and other blood disorders, such as Hodgkin’s lymphoma (a cancer of the lymphatic system) and polycythemia vera (a blood disorder with overproduction of red blood cells) Systemic conditions such as urticaria (hives), hyperthyroidism (overactive thyroid), iron deficiency anemia, uremia (high levels of waste products in the blood, seen in kidney failure), and cholestasis (impaired bile flow) Medications such as opioids, antimalarial drugs Allergic food triggers, including reactions to shellfish, nuts, and nitrates Heat exposure Pregnancy Neurological causes such as notalgia paresthetica (a sensory disorder causing an itch below the left shoulder blade)...