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A peak flow meter for asthma is like a thermometer for a fever - it helps you keep track of what's going on inside your lungs by measuring airflow out of the lungs.

Heart failure is a condition in which the heart can't pump enough blood to meet the body's needs.

Detailed information on keratosis pilaris, including symptoms, diagnosis, and treatment.

Diabetic neuropathy is nerve damage due to diabetes. Over time, high blood sugar (glucose) can damage the tiny blood vessels that supply your nerves, especially in the legs and feet.

Inhalers and nebulizers deliver medicine directly to the lungs. They cause fewer side effects than medicine taken by mouth or injection.

Candidiasis is an infection caused by yeast called Candida. Candida normally causes no harm, and is found on the skin, vaginal area, and digestive system. But in some cases, it can overgrow. This can cause a rash, itching, and other symptoms.

Echocardiography is an imaging test. It uses sound waves to make detailed moving pictures of the heart. It shows the size and shape of the heart, as well as the heart chambers and valves. Transesophageal echocardiography (TEE) uses a device, called a transducer, that is placed in the esophagus.

An abscess is a pocket of infection. In the brain, an abscess may be in one or more areas. This condition may cause problems with how the brain and spinal cord function. It is a serious and life-threatening condition that needs to be treated right away.

Guillain-Barré syndrome (GBS) is a short-term but often life-threatening disorder that affects the nerves in the body. GBS can cause muscle weakness, pain, and short-term (temporary) paralysis of the facial, chest, and leg muscles.