H. pylori infection occurs when a bacterium called Helicobacter pylori (H. pylori) infects your stomach or the first part of your small intestine.
Novel H1N1 flu, popularly known as swine flu, is a respiratory infection caused by an influenza virus first recognized in spring 2009. The new virus, which is officially called swine influenza A (H1N1), contains genetic material from human, swine and avian flu viruses.
Hair loss can start with a few extra hairs in the sink or in your comb. Later, it can progress to a bare scalp.
A hangover is a group of unpleasant signs and symptoms that can develop after drinking too much alcohol. As if feeling awful weren't bad enough, hangover is also associated with poor performance and conflict at work.
Hay fever, also called allergic rhinitis, causes cold-like signs and symptoms such as a runny nose, congestion, sneezing and sinus pressure. But unlike a cold, hay fever isn't caused by a virus. Hay fever is caused by an allergic response to outdoor or indoor allergens.
Head lice are a very common problem, second only to the common cold among communicable diseases affecting schoolchildren.
Most people have headaches from time to time. But if you have a headache more days than not, you may be experiencing a variety of head pain known as chronic daily headaches.
Headaches in children are common and are usually not serious. Like adults, children can develop migraines, chronic daily headaches or stress-related (tension) headaches, although their symptoms may be different.
Gradual hearing loss that occurs as you age (presbycusis) is common. According to the National Institutes of Health, an estimated one-third of Americans between the ages of 65 and 75 and close to one-half of those older than 75 have some degree of hearing loss.
Heart rhythm problems (heart arrhythmias) occur when the electrical impulses in your heart that coordinate your heartbeats don't function properly, causing your heart to beat too fast, too slow or irregularly.
A heart attack usually occurs when a blood clot blocks the flow of blood through a coronary artery — a blood vessel that feeds blood to a part of the heart muscle. Interrupted blood flow to your heart can damage or destroy a part of the heart muscle.
In Ireland, especially among men, Heart Disease is one of the biggest killers. In this article I detail what heart disease is, what the risks of heart disease are, what causes heart disease, the tests available to test for heart disease and the many treatment options available for heart disease.
Heart failure, also known as congestive heart failure (CHF), means your heart can't pump enough blood to meet your body's needs.
Heart murmurs are abnormal sounds during your heartbeat cycle — such as whooshing or swishing — made by turbulent blood in or near your heart. These sounds can be heard with a stethoscope.
Heart palpitations are the feelings of having rapid, fluttering or pounding heartbeats. Heart palpitations can be triggered by stress, exercise, medication or, rarely, an underlying medical condition.
Heartburn is a burning sensation in your chest, just behind your breastbone. Heartburn pain is often worse when lying down or bending over.
Heat rash — also known as prickly heat and miliaria — isn't just for babies. Though it's common in infants, heat rash can affect adults too, especially during hot, humid weather.
Heatstroke is a life-threatening condition that occurs when your body temperature reaches 104 F (40 C) or higher. Heatstroke can be brought on by high environmental temperatures, by strenuous physical activity or by other conditions that raise your body temperature.
Hereditary hemochromatosis, an inherited condition, causes your body to absorb too much iron from the food you eat. The excess iron is stored in your organs, especially your liver, heart and pancreas.
Hemophilia is a disorder of your blood-clotting system. Clotting is the process by which your blood changes from a liquid to a solid state in order to stop bleeding.