Alternative medicine
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Osteoarthritis
This most common form of arthritis mainly affects joints in your hands, knees, hips and spine. There's no cure, but symptoms can be managed.
Orthostatic hypotension (postural hypotension)
This form of low blood pressure might cause dizziness, lightheadedness or fainting when rising from sitting or lying down.
Orchitis
This inflammation of one or both testicles can cause pain and infertility. It's usually caused by a bacterial infection or the mumps virus.
Occupational asthma
Dust, fumes and other substances at work can cause asthma. Find out how to recognize this common type of asthma.
Obstructive sleep apnea
Learn the signs that point to this common and potentially serious sleep disorder. And find out the treatments that can help you sleep better.
Norovirus infection
This highly contagious virus spreads through contaminated food, water or surfaces and causes vomiting and diarrhea. Learn ways to protect yourself.
Nearsightedness
Tired of squinting at objects in the distance? There are effective treatment options for this eye condition, and some preventive options are emerging.
Nasopharyngeal carcinoma
Nasopharyngeal carcinoma is cancer that occurs in the nasopharynx, which is located behind your nose and above the back of your throat.
Nail fungus
Learn about symptoms, treatment and prevention of this common infection among older adults that causes nails to discolor and crumble.
Myxofibrosarcoma
Learn about this connective tissue cancer that often starts in the arms and legs. MFS treatments include surgery, radiation therapy and chemotherapy.
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