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Cystitis

Cystitis is a condition that affects the bladder. It happens most often when bacteria cause…

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Cystoscopy

This imaging exam uses a hollow tube with a lens to show the inside of…

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Cytochrome P450 (CYP450) tests

CYP450 tests may help find out how your body processes an antidepressant. The tests are…

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Cytomegalovirus (CMV) infection

Understand the symptoms and treatment of this common viral infection, which can cause serious health…

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Daily aspirin therapy: Understand the benefits and risks

Daily aspirin therapy may be lifesaving for some people. Know if taking a daily low-dose…

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Dandruff

Find out what causes a flaky scalp and which medicated shampoos and self-care tips can…

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Dark circles under eyes

Overview covers causes, remedies for this common symptom.

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DASH diet: Guide to recommended servings

Use this chart of DASH diet recommended servings by food group to plan healthy meals…

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DASH diet: Healthy eating to lower your blood pressure

This way of eating can help control blood pressure and boost health in other ways….

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DASH diet: Sample menus

Interested in following the DASH diet? Here are sample menus to get you started.

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奎文腱鞘炎

This painful condition affects the tendons on the thumb side of the wrist. A splint…

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Debunking COVID-19 myths

Some information you come across about COVID-19 may be out of date or false. Learn…

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Deceased-donor kidney transplant

Find out more about deceased-donor kidney transplant, a treatment for end-stage kidney disease.

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Deep brain stimulation

Learn how electrical stimulation of the brain can be used to treat conditions such as…

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Deep vein thrombosis (DVT)

This potentially serious condition can occur with few or no symptoms. Know the risk factors.

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Degenerative changes in the spine: Is this arthritis?

Degenerative changes in the spine visible on X-rays indicate osteoarthritis of the spine.

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脫水

The body not having enough water and other fluids is very risky for infants, young…

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Delayed ejaculation

Learn what can cause delayed or absent ejaculation and how it can be treated.

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Delayed sleep phase

Learn more about this sleep condition that causes a delay in usual sleep patterns.

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Delaying your period with hormonal birth control

Delaying periods is possible with an extended or ongoing method of birth control. Find out…

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Delirium

Learn what may cause this change in mental abilities. Symptoms develop fast and include confusion…

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Delusional parasitosis

Learn more about this condition and positive steps you can take to manage the symptoms.

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Dementia

This group of symptoms with many causes affects memory, thinking and social abilities. Some symptoms…

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Demyelinating disease: What can you do about it?

Learn the causes and types of these diseases that affect the protective covering of nerves,…

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Dengue fever

Learn how to identify the symptoms of this serious, mosquito-borne infection and how to protect…

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Dense breast tissue: What it means to have dense breasts

Find out what it means if your mammogram report says you have dense breast tissue….

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Dental floss vs. water flosser: Which is better?

Cleaning between your teeth every day is an important part of keeping your mouth healthy.

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Dental implant surgery

This procedure replaces tooth roots with metal, screwlike posts. Artificial teeth sit on top of…

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Denture care: How do I clean dentures?

Follow these best practices to keep your removable partial or full dentures clean, free from…

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Depersonalization-derealization disorder

This mental health condition causes you to feel like you're seeing yourself from outside your…

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