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Opioid stewardship: What is it?

Learn about the roles everyone plays in opioid stewardship, safety and overdose.

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Oppositional defiant disorder (ODD)

This childhood mental health condition includes frequent and persistent anger, irritability, arguing, defiance or vindictiveness…

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Optic neuritis

Learn about this painful eye disorder that affects your optic nerve and what your doctor…

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Oral cancer screening

Learn about the benefits and limitations of tests to detect mouth cancer.

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Oral health: A window to your overall health

Find out about the link between your oral health and overall health.

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Oral lichen planus

This ongoing inflammatory condition results in white, lacy patches or red, swollen tissues or open…

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Oral thrush

This infection is caused by the overgrowth of the fungus Candida albicans in the mouth.

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Orchitis

This infection of one or both testicles can cause pain and infertility. A bacterial infection…

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Organ donation: Don't let these myths confuse you

This practice saves lives, but wrong ideas surround it. Get the facts about being an…

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Organic foods: Are they safer? More nutritious?

Understand the differences between organic foods and traditionally grown foods when it comes to nutrition,…

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Orthostatic hypotension (postural hypotension)

This form of low blood pressure might cause dizziness, lightheadedness or fainting when rising from…

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Osteoarthritis

This most common form of arthritis mainly affects joints in your hands, knees, hips and…

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Osteochondritis dissecans

Osteochondritis dissecans most commonly affects children who are very active in sports. Learn about the…

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Osteomyelitis

Bones don't get infected easily, but a serious injury, bloodstream infection or surgery may lead…

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Osteopathic medicine: What kind of doctor is a D.O.?

You know what M.D. means, but what does D.O. mean? What's different and what's alike…

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Osteoporosis

Fractures associated with this bone-weakening condition can be life altering. Good nutrition, regular exercise and…

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Osteoporosis treatment: Medications can help

Find out more about your options for bone-preserving drugs, including how often you need to…

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Osteosarcoma

Learn about the symptoms and causes of this bone cancer that happens most often in…

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Ostomy: Adapting to life after colostomy, ileostomy or urostomy

Tips for coping with your stoma after colostomy, ileostomy or urostomy surgery.

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Otoplasty

Learn about this surgery that can change the appearance of the ears. Understand risks and…

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Outpatient joint replacement: Is it a safe option?

Joint replacement of the hip, knee, elbow and shoulder can be done safely as outpatient…

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Ovarian cancer

Learn more about cancer of the ovaries, including symptoms and treatments, such as surgery, chemotherapy…

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Ovarian cancer: Still possible after hysterectomy?

Surgery to remove your uterus may affect your risk of ovarian cancer, depending on the…

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Ovarian cysts

Many women have ovarian cysts at some time. Most are harmless, but some can cause…

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Ovarian cysts and infertility: A connection?

Some types of cysts that form in or on an ovary can lead to trouble…

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Ovarian hyperstimulation syndrome

Learn about this possible complication of fertility treatments and how to recognize when you need…

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Overactive bladder

Learn how you can get relief for sudden urges to urinate, which may point to…

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Overdue pregnancy: What to do when baby's overdue

Past your due date? Understand why a pregnancy might be overdue and what's next.

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Ovulation signs: When is conception most likely?

Trying to get pregnant? Learn about symptoms of ovulation

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Ozone air purifiers: Can they improve asthma symptoms?

Ozone air purifiers don't reduce asthma symptoms. In fact, they can make asthma worse.

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