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Down syndrome

In this genetic condition, an unusual cell division results in extra genetic material from chromosome…

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Downward-facing dog

Relax with this yoga pose and stretch your legs and back.

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Dressler syndrome

Learn about the symptoms and treatment of this condition that involves swelling and irritation of…

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Drinking alcohol: Is it safe after hepatitis C cure?

Your hepatitis C infection has been cured. But is it safe to drink alcohol again?

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Drug addiction (substance use disorder)

Drug addiction affects your brain and behavior to the point where you can't control your…

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Drug allergy

Learn which medicines are more likely to cause an allergic reaction, what symptoms look like…

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Drug-eluting stents: Do they increase heart attack risk?

Stents coated with a slow-release drug are safe when used with proper medications. Find out…

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Dry eyes

Eyes feeling dry and uncomfortable? Inadequate tear production is a common — and very treatable…

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Dry macular degeneration

Blurred or reduced central vision could be a sign of macular degeneration. Find out about…

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Dry mouth

With this condition, also known as xerostomia, the salivary glands in the mouth don't make…

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Dry mouth treatment: Tips for controlling dry mouth

To ease dry mouth, chew sugar-free gum or suck on sugar-free hard candy to keep…

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Dry orgasm

It's possible for men to reach sexual climax without ejaculating. Learn about the possible causes.

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Dry skin

Learn more about the causes of and self-care tips for a common flaky skin condition…

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Dry socket

This painful condition can happen after tooth removal. A blood clot where the tooth was…

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Ductal carcinoma in situ (DCIS)

Noninvasive breast cancer often has no symptoms. Find out about the causes, diagnosis and treatment…

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Dumping syndrome

People who have had stomach or weight-loss surgery can develop dumping syndrome, which causes cramping,…

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Dupuytren contracture

This condition causes one or more fingers to bend toward the palm of the hand.…

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Dural arteriovenous fistulas

Learn about these rare, irregular connections that can occur between arteries and veins in the…

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Dust mite allergy

This allergy can lead to year-round sniffles and sneezes. Here's how to find relief.

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Dwarfism

Very short stature of 4 feet 10 inches or less that results from a genetic…

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Dysarthria

This condition affects muscles used for speaking. Speech therapy and treating the underlying cause may…

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Dyshidrosis

Learn about the symptoms, causes and treatment of this skin condition that causes painful, itchy…

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Dyslexia

This learning disorder involves difficulty reading due to problems identifying speech sounds and learning how…

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Dysphagia

Having trouble swallowing? Learn more about what causes this common issue, along with therapies for…

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Dystonia

Find out more about this painful movement disorder and ways to improve muscle function.

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E. coli

Most strains of E. coli bacteria are harmless, but some can cause severe symptoms. Learn…

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Ear infection (middle ear)

These usually get better on their own, but sometimes medicine is needed. Find out more…

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Ear reconstruction

Learn about this cosmetic procedure, which is done to rebuild an ear. Understand the risks…

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Ear tubes

Learn about the procedure for placing ear tubes used to treat middle ear problems.

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Early HIV symptoms: What are they?

Early signs of the disease can include fever, fatigue and swollen lymph glands. Learn more.

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