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Hyperglycemia in diabetes

Hyperglycemia in diabetes can occur for many reasons. Know the causes, symptoms and treatments of…

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Hyperhidrosis

Learn more about causes, symptoms, treatment and self-care tips for this condition that causes heavy…

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Hyperinflated lungs: What does it mean?

If you can’t breathe out well, as in COPD, air may get trapped inside your…

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Hyperinsulinemia: Is it diabetes?

Hyperinsulinemia often is associated with type 2 diabetes.

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Hyperoxaluria and oxalosis

Learn about symptoms, causes, diagnosis and treatment for these rare kidney problems.

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Hyperparathyroidism

Learn about symptoms, tests and treatment for this condition caused by overactivity of the parathyroid…

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Hypertensive crisis: What are the symptoms?

A sudden rise in blood pressure over 180/120 mm Hg is considered a medical emergency,…

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Hyperthermic intraperitoneal chemotherapy (HIPEC)

Learn about this specialized "hot" chemotherapy treatment that targets cancer in the abdominal cavity.

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Hyperthyroidism (overactive thyroid)

Understand what happens when your thyroid is overactive and learn about treatment for this condition.

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Hypertrophic cardiomyopathy

In this condition, the heart muscle thickens, which makes it harder for the heart to…

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Hypnosis

Find out about this changed state of awareness and the conditions it may help.

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Hypoglycemia

Low blood sugar can cause uncomfortable symptoms, such as dizziness and confusion, and can quickly…

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Hyponatremia

Hyponatremia is the term used when your blood sodium is too low. Learn about symptoms,…

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Hypoparathyroidism

Learn more about this condition in which low levels of parathyroid hormone upset the balance…

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Hypopituitarism

Learn about the symptoms and treatment of this rare condition caused by a problem with…

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Hypoplastic left heart syndrome

Learn more about this rare congenital heart defect that causes the left side of the…

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Hypospadias

This condition happens before birth. The opening of the urethra is on the underside of…

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Hypothermia

Learn about symptoms, treatment and prevention of this life-threatening condition in which the body loses…

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Hypothermia: First aid

How to administer first aid for someone with cold body temperature.

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Hypothyroidism and infertility: Any connection?

For women, there's sometimes a link between having an underactive thyroid gland (hypothyroidism) and infertility.

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Hypothyroidism: Can calcium supplements interfere with treatment?

Calcium supplements can interfere with how the body absorbs medications used to treat hypothyroidism.

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Hypothyroidism: Can it cause peripheral neuropathy?

Hypothyroidism can cause damage to peripheral nerves and can lead to conditions such as carpal…

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Hypothyroidism diet: Can certain foods increase thyroid function?

There's no evidence that eating or avoiding certain foods will help the thyroid work better…

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Hypothyroidism: Does it cause joint pain?

Hypothyroidism can cause muscle and joint problems, such as pain and stiffness.

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Hypothyroidism: Should I take iodine supplements?

Although iodine deficiency can cause hypothyroidism, this deficiency is rare in the United States.

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Hypothyroidism symptoms: Can hypothyroidism cause eye problems?

Hypothyroidism symptoms can vary, but eye problems aren't usually a concern.

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Hypothyroidism (underactive thyroid)

Understand what happens when your thyroid is underactive and learn about treatment for this condition.

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Idiopathic hypersomnia

Learn about this sleep condition that causes extreme sleepiness during the day and trouble waking…

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IgA nephropathy (Berger disease)

This disease causes kidney inflammation that, over time, can interfere with the kidneys' ability to…

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Ileoanal anastomosis (J-pouch) surgery

This surgery removes the large intestine. It's often done to treat ulcerative colitis and other…

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