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The medical conditions database is designed to help you and your loved ones learn about the cause, prevention, symptoms, and treatment of medical conditions to better understand various conditions.

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  • Headaches

    Headaches are extremely common – most people have a headache at some time in their life. Most headaches disappear on their own (with a

    Hearing Loss and Deafness

    Hearing loss is the reduced ability to hear sound. Deafness is the complete inability to hear sound. Deafness and hearing loss have many causes

    Heart Attack

    The heart is one of the largest muscles in the body. The wall of the heart is the muscle that does the pumping, and

    Heat Stroke

    Heat stroke is also known as sunstroke, thermic fever, or siriasis. It happens when the body’s mechanisms for controlling temperature fail. Heat stroke is

    Hemochromatosis

    Hemochromatosis is primarily an inherited (genetic) condition that allows too much iron to be absorbed and stored throughout the body. It’s one of the

    Hemophilia

    Hemophilia is a rare bleeding disorder in which the blood does not clot normally. People with hemophilia have little or no blood clotting factors,

    Hemorrhoids

    Hemorrhoids, also called "piles," are swollen tissues that contain veins. They are located in the wall of the rectum and anus and may cause

    Hepatitis A and B

    Hepatitis is the medical term for inflammation of the liver. Hepatitis may be acute (lasting only for the short term, after which a person

    Hepatitis C

    Hepatitis is the medical term for inflammation of the liver. The hepatitis C virus is one of the many causes of inflammation of the

    Hernia

    A hernia occurs when a portion of tissue in your body bulges into or penetrates a weakened muscle area. Theoretically, hernias can happen anywhere

    Herniated Disc

    The spine is made up of cylindrical bones called vertebrae. Between the bones of the spine are small discs made of a thick layer

    High Blood Pressure

    Heart disease is one of the leading causes of death worldwide, and people who have abnormally high pressure in their arteries are far more

    High Cholesterol

    Cholesterol is a fatty substance your body needs to rebuild its cells and to make certain hormones. It’s carried throughout your body in your

    HIV/AIDS

    AIDS (acquired immune deficiency syndrome) was first recognized in North America in the early 1980s. It is caused by a virus known as HIV

    Hives

    Hives, called urticaria by doctors, is one of the most common causes of skin inflammation. Up to 20% of the population will suffer from

    Hodgkin’s Disease

    Hodgkin lymphoma is the name for a group of cancers that start in the lymph nodes and then spread to surrounding areas of the

    HPV Infection

    The human papillomavirus (HPV) is a virus that causes skin and mucous membrane (the moist lining of body cavities such as the mouth and

    Huntington’s Disease

    Huntington’s disease, also called Huntington’s chorea, is a hereditary condition that affects the brain, specifically an area called the basal ganglia (located deep in

    Hyperhidrosis

    Approximately 4 million sweat glands cover the body and produce the clear liquid that we know as sweat. The body produces sweat to help

    Hyperthyroidism

    The thyroid is a gland located in your neck, just beneath the Adam’s apple. It releases hormones – thyroxine (T4) and triiodothyronine (T3) –

    Hypoglycemia

    Hypoglycemia occurs when the level of glucose (sugar) in the blood is too low. Normally, your body keeps your blood glucose within a concentration

    Hypothermia and Frostbite

    Hypothermiaoccurs when you have abnormally low body temperature. Normal body temperature is around 37°C (98.6°F), as measured by mouth. Hypothermia is defined as a

    Hypothyroidism

    The thyroid is a gland located in the neck below the Adam’s apple. It helps control the body’s metabolic rate by producing the hormones

    IgA Nephropathy

    IgA nephropathy, also called Berger’s disease, is a kidney disorder that causes inflammation of the glomeruli, the individual filtering units of the kidney that

    Infectious Mononucleosis

    Infectious mononucleosis (called "mono" for short) is caused by the Epstein-Barr virus (EBV), a virus that affects nearly everybody at some point. The disease

    Infertility

    Infertility is usually defined as the inability to become pregnant after one year of vaginal intercourse without birth control. Without contraception, frequent intercourse results

    Influenza

    The flu is a respiratory (i.e., nose, throat, and lung) infection that can be caused by a variety of influenza viruses. Many people use

    Insect Bites and Stings

    In North America, there are very few types of insects that carry venom or poison, and none whose venom is dangerous. However, it is

    Insomnia

    Insomnia can refer to difficulty getting to sleep, difficulty staying asleep, waking up early without being able to return to sleep, or a combination

    Iron Deficiency Anemia

    The blood that circulates throughout the body performs a number of critical functions. It delivers oxygen, removes carbon dioxide, and carries life-sustaining nutrients. By

    Irritable Bowel Syndrome

    Irritable bowel syndrome (IBS) is a common disorder of the intestine, causing abdominal pain with constipation, diarrhea, or alternating periods of both. IBS is

    Jaundice

    Jaundice is a symptom of many medical problems but it is most often associated with conditions of the liver or the gallbladder. Jaundice causes

    Jet Lag

    Jet lag occurs when there’s a mismatch between the time of a person’s internal clock and the events affecting that person as a result

    Kaposi’s Sarcoma

    Kaposi’s sarcoma (KS) is a cancer caused by infection with human herpesvirus 8 (HHV8). It causes purple, brown, or bluish-red tumours that look like

    Kawasaki Disease

    Kawasaki disease, also called Kawasaki syndrome, is the leading cause of acquired heart disease in children in the developed world. It usually appears in

    Keloids

    Keloids are benign (noncancerous), fibrous skin tumours. They are most common in people with darker skin (e.g., people from West Africa or Southern India).

    Kidney Disease

    The kidneys, each about the size of a fist, play three major roles: removing waste products from the body, keeping toxins from building up

    Kidney Stones

    A kidney stone is formed when a small speck of mineral settles out of the urine into the kidney or the ureter, a tube

    Labyrinthitis

    Labyrinthitis is an inflammation of the inner ear. The labyrinth is a structure of fluid-filled sacs and tubes just inside the skull. It contains

    Laryngitis

    Laryngitis occurs when the part of the throat called the larynx becomes inflamed. When this happens, it causes a severe hoarseness that can make

    Legionnaires’ Disease

    Legionnaires’ disease, or legionellosis, is a lung infection (pneumonia) caused by bacteria of the species Legionella. This organism was first discovered in 1976, when

    Leukemia

    Leukemia is a type of cancer that results in the body making too many abnormal white blood cells. This uncontrolled production results in an

    Lice

    Lice are tiny parasitic insects that can take up residence in a number of different places on our body. They are not a serious

    Listeriosis

    Listeriosis is a foodborne illness. It most commonly affects newborns, people with weakened immune systems, seniors, and pregnant women. Pregnant women are at particular

    Liver Cancer

    The liver, the largest gland in the body, plays a vital role in keeping us alive. Its many functions include storing vitamins and nutrients,

    Liver Disorders

    The liver is the largest internal organ in the body. Its main functions are to: metabolize most of the nutrients that are absorbed by

    Low Back Pain

    Low back pain is one of the most common reasons for visiting a doctor. Most North Americans will experience low back pain at some

    Low Blood Pressure

    Given that people with high blood pressure (hypertension) are far more likely than others to die prematurely of heart disease and stroke, you might

    Lung Cancer

    In Canada, lung cancer is the leading cause of death from cancer for both men and women. The majority of lung cancers start in

    Lupus

    Lupus, also called systemic lupus erythematosus (SLE), is a chronic inflammatory condition that can affect any part of the body, including the skin, joints,

    All material © 1996-2019 MediResource Inc. Terms and conditions of use. The contents herein are for informational purposes only. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.

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