Scabies is one cause of itching. Swimmer's itch Athlete's foot (showing the toes from below plus the front part of the sole) Infections *Body louse, found in substandard living conditions *Cutaneous larva migrans, a skin disease *Head lice, if limited to the neck and scalp *Herpes, a viral disease *Insect bites, such as those from mosquitos or chiggers *Pubic lice, if limited to the genital area *Scabies, especially when several other persons in close contact also itch *Shaving, which may irritate the skin *Swimmer's itch, a short-term immune reaction *Varicella – i.e. chickenpox, prevalent among young children and highly contagious *Tungiasis, ectoparasite of skin Environmental and allergic *Allergic reaction to contact with specific chemicals, such as urushiol, derived from poison ivy or poison oak, or Balsam of Peru, found in many foods and fragrances. Certain allergens may be diagnosed in a patch test. *Foreign objects on the skin are the most common cause of non-pathological itching. *Photodermatitis – sunlight reacts with chemicals in the skin, leading to the formation of irritant metabolites *Urticaria (also called hives) usually causes itching Skin disorders * Dandruff – an unusually large amount of flaking is associated with this sensation * Punctate palmoplantar keratoderma, a group of disorders characterized by abnormal thickening of the palms and soles * Skin condition (such as psoriasis, eczema, seborrhoeic dermatitis, sunburn, athlete's foot, and hidradenitis suppurativa). Most are of an inflammatory nature. * Scab healing, scar growth, and the development or emergence of moles, pimples, and ingrown hairs from below the epidermis * Xerosis – dry skin, frequently seen in the winter and also associated with older age, frequent bathing in hot showers or baths, and high-temperature and low-humidity environments Other medical disorders * Diabetes mellitus, a group of metabolic diseases in which a person has high blood sugar * Hyperparathyroidism, overactivity of the parathyroid glands resulting in excess production of parathyroid hormone (PTH) * Iron deficiency anemia, a common anemia (low red blood cell or hemoglobin levels) * Cholestasis, where bile acids leaking into the serum activate peripheral opioid receptors, resulting in the characteristic generalized, severe itching * Jaundice, where excess bilirubin (hyperbilirubinemia) irritates nerves in the skin * Malignancy or internal cancer, such as lymphoma or Hodgkin's disease * Polycythemia, which can cause generalized itching due to increased histamines * Psychiatric disease ("psychogenic itch", as may be seen in delusional parasitosis) * Thyroid illness * Uraemia – the itching sensation this causes is known as uremic pruritus Medication * Drugs (such as opioids) that activate histamine (H1) receptors or trigger histamine release * Chloroquine, a drug used in the treatment and prevention of malaria * Bile acid congeners such as obeticholic acid Related to pregnancy * Gestational pemphigoid, a dermatosis of pregnancy * Intrahepatic cholestasis of pregnancy, a medical condition in which cholestasis occurs * Pruritic urticarial papules and plaques of pregnancy (PUPPP), a chronic hives-like rash Other * Menopause, or changes in hormonal balances associated with aging *Terminal illness
symptom of Primary biliary cholangitis
symptoms of Primary biliary cholangitis
symptom of Autoimmune hepatitis
symptom of Hepatitis A
symptom of Gallbladder cancer
medical cause of Pancreatitis
symptom of Hepatitis D
symptom of Giardiasis