Hashimoto's thyroiditis also called autoimmune thyroiditis and chronic lymphocytic thyroiditis, is a chronic inflammation of the thyroid. MedicineNetLabtestsonlineMayoClinic
Hypersensitivity Vasculitis (HV) or small vessel vasculitis has red spots usually on forearms and legs may be caused by sensitivity to a drug taken. Vasculitis Foundation
Inflammatory bowel disease. Also called colitis, enteritis and ileitis. Refers to chronic, autoimmune, inflammatory diseases of the bowel, mainly ulcerative colitis and Crohn ‘s disease. eMedicineHealth
Isolated vasculitis of the Central nervous system or CNS Vasculitis - inflames the blood vessels in the brain and spinal cord with symptom's including headaches. Can have sudden onset or be a waxing and waning condition. Cleveland ClinicCNS Vasculitis Foundation's
Isaacs' Syndrome: Neuromyotonia An Antibody-mediated Potassium Channelopathy with twitching of the muscles, increasing muscle stiffness and increased sweating. NINDSMedical links
Kawasaki disease (KD) is a serious children's disease with high fever, red eyes, body rash, swollen tongue, sore throat and swollen glands. KidsHealth.org