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alkalosis - condition in which blood becomes too alkaline, due to acid loss from vomiting, kidney malfunction, or ingestion of alkalis
allergy - hypersensitivity to particular substance or antigen, such as pollens, furs, feathers, mold, dust, drugs, dyes, cosmetics, or foods, causing characteristic symptoms when encountered, ingested, or inhaled
alopecia - absence of hair from area where it normally grows, esp. progressive hair loss in men; baldness
altitude sickness - respiratory illness from lack of oxygen and reduced atmospheric pressure at high altitudes that causes nausea and exhaustion
amblyopia - poor sight not caused by intrinsic eye disease
amenorrhea - absence or cessation of menstruation due to congenital defect, hormonal deficiency, hypothalamus disorder, or emotional problem
amnesia - total or partial memory loss due to disease, injury, or trauma
anaphylaxis - acute, allergic reaction to substance to which person has been previously sensitized, resulting in faintness, palpitations, loss of color, difficulty in breathing, and shock
anemia - reduced hemoglobin in blood, causing fatigue, breathlessness, and pallor
anorexia nervosa - extreme loss of appetite, esp. in adolescent females, causing severe weight loss and starvation
anoxia - condition in which body tissues receive inadequate oxygen
anxiety disorder - physiological symptoms caused by anxiety neurosis
asthma - paroxysmal attacks of bronchial spasms that cause difficulty in breathing, often hereditary; bronchial asthma
astigmatism - distortion of visual images due to failure of retina to focus light
athlete’s foot - contagious fungal infection of skin between toes; tinea
atopy - allergic reaction, esp. one separate from point of contact with antigen, such as eczema on skin due to swallowed substance
autism - severe psychiatric disorder of childhood that causes inability to speak or form abstract concepts and withdrawal from reality
backache - chronic and persistent or recurrent pain in lower back or shoulders, usu. due to tension or injury
claudication - cramping pain from inadequate blood supply to muscle
compressed air sickness - formation of nitrogen bubbles in bloodstream after experiencing high pressure at great ocean depths or high altitudes, characterized by pain and blockage of circulation; aeroembolism; bends; caisson disease; decompression sickness
condition - state of ill health, esp. recurrent or chronic, caused by illness, injury, or heredity
dehydration - deficiency or loss of water in body tissues marked by thirst, nausea, and exhaustion
delirium - acute mental disorder due to organic brain disease, causing hallucinations, disorientation, and extreme excitation
delirium tremens - dt’s; psychosis due to alcoholic withdrawal, causing tremors, anxiety, sweating, and vivid hallucinations
dependence - physical or psychological compulsion to consume certain drugs; addiction
diaper rash - painful, reddened, raw area of skin around anus, buttocks, and genitals due to irritant stools, urine-soaked diapers, or candidiasis infection
diplegia - paralysis involving both sides of body, esp. legs
disorder - malfunction of normal metabolic or physiological process or part
heat prostration - fatigue and collapse from low blood pressure due to loss of body fluids after prolonged exposure to heat; heat exhaustion
heatstroke - increased body temperature and eventual loss of consciousness without sweating, due to failure of body’s heat regulating mechanism after prolonged exposure to heat; sunstroke
hemophilia - hereditary deficiency of one blood coagulant that causes slowness in clotting and prolonged or spontaneous bleeding
hemorrhoids - enlarged veins in anus walls, esp. due to prolonged constipation or diarrhea, characterized by fissure, painful swelling, and bleeding; piles
hives - round, red itching wheals up to several inches across on skin, caused by acute or chronic allergic reaction; urticaria
housemaid’s knee - fluid-filled swelling of bursa in front of kneecap, often caused by prolonged kneeling
hydrocephalus - excess of cerebrospinal fluid in brain ventricles that causes enlargement of head in children and pressure and drowsiness in adults
hyperinsulinism - overproduction of insulin, due to glandular disturbances or poor nutrition, producing symptoms of hypoglycemia
incontinence - involuntary passage or leakage of urine
ingrown toenail - condition in which toenail grows into surrounding tissue
intestinal obstruction - blockage that prevents passage of feces through intestine, due to hernia, tumor, or inflammation, causing pain and sometimes vomiting
irritable bowel syndrome - recurrent chronic abdominal pain with constipation and/or diarrhea caused by abnormal contractions of colon muscles; spastic colon
jet lag - disruption of biological and psychological rhythms by lengthy jet travel, causing mood alterations, sleep disturbance, and stress
kidney stone - hard, pebblelike mass in kidney that causes pain and blood in urine; nephrolithiasis; renal calculus
psoriasis - condition characterized by chronic, itchy, scaly silvery patches of skin, esp. on elbows, forearms, knees, and scalp, of unknown cause but sometimes due to anxiety
pulmonary embolism - obstruction by blood clot of artery that conveys blood from heart to lungs
Raynaud’s disease - disorder, esp. in women, in which spasms of arteries to extremities cause fingertips and toes to turn pale, blue, and numb