Skin diseases

• Xerosis (dry skin)
• Scabies
• Urticaria
• Atopic dermatitis
• Contact dermatitis
• Arthropod bites (insect bites)
• Pediculosis (lice)
• Dermatitis herpetiformis
• Anogenital pruritus
• Lichen simplex chronicus
• Drug reaction
• Urticarial eruptions of pregnancy
• Folliculitis

Non-skin diseases

• Uremia
• Hyperbilirubinemia or cholestasis
• Hepatitis C
• Amphetamine or cocaine use
• Hypothyroidism or hyperthyroidism
• Intestinal parasites
• Lymphoma, leukemia, other malignancy
• Polycythemia vera
• Iron-deficiency anemia
• Psychiatric

• Anogenital pruritus