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Diseases & Conditions

Menstrual cramps

Menstrual cramps — pain in the lower abdomen just before or during menstrual periods —…

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Menstrual cycle: What's normal, what's not

Learn about how to track your menstrual cycles and what any changes may mean.

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Mental health: Know when to get help

Find out how mental health conditions are defined and diagnosed.

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Mental health: Overcoming the stigma of mental illness

Learn how to spot and deal with negative beliefs that some people have about mental…

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Mental health providers: Tips on finding one

Learn how to find providers who match your mental health needs, including psychiatrists and psychologists.

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Mental illness

A wide range of mental health conditions affect mood, thinking and behavior and can make…

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Mental illness in children: Know the signs

It can be hard to tell the difference between typical behavior and symptoms of mental…

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Menus for heart-healthy eating: Cut the fat and salt

Use these menus to jump-start your heart-friendly eating plan.

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Meralgia paresthetica

Learn about this condition that causes burning, tingling and numbness in the thigh, and how…

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Merkel cell carcinoma

Learn about this skin cancer that grows quickly. Find out about symptoms, diagnosis and treatments,…

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Mesenteric ischemia

This condition can come on suddenly or develop over time. Find out more about symptoms…

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Mesenteric lymphadenitis

This condition involves swollen lymph nodes in the membrane that connects the bowel to the…

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Mesh in female pelvic reconstructive surgery

Find out about the risks and benefits of using surgical mesh to treat pelvic floor…

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Mesothelioma

Learn about this uncommon cancer that's linked to being around asbestos. Treatments include surgery, radiation…

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Metabolic syndrome

Having three or more specific risk factors, such as high blood pressure or abdominal fat,…

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Metabolism and weight loss: How you burn calories

Learn if your metabolism influences weight loss — or weight gain.

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Metachromatic leukodystrophy

This rare genetic disorder causes fatty substances (sulfatides) to build up in your brain and…

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Metastatic castration-resistant prostate cancer (mCRPC)

Learn about treatments for prostate cancer that no longer responds to hormone therapy. Options include…

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Metastatic (stage 4) prostate cancer

Find out about diagnosis and treatment of this cancer that has spread to the lymph…

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Metatarsalgia

With this condition, the ball of the foot becomes painful and irritated. Learn about the…

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Microcephaly

Learn more about microcephaly, when an infant's head is smaller than expected. The condition affects…

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Microscopic colitis

Ongoing, watery diarrhea could be a sign of this condition of the colon. Find out…

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Migraine

Find out more about these painful headaches that can last hours to days. They also…

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Migraine medications and antidepressants: A risky mix?

Combining migraine medicines and antidepressants may pose several concerns.

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Migraine treatment: Can antidepressants help?

Certain antidepressants are used in migraine treatment. Learn more about these medications.

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Migraine with aura

Learn more about migraine that causes pain and sensory disturbances (aura), such as flashes of…

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Migraines and gastrointestinal problems: Is there a link?

Migraines can be linked with certain gastrointestinal problems. Learn more.

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Migraines: Are they triggered by weather changes?

Migraines — Are they triggered by weather changes?

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Migraines: Simple steps to head off the pain

Learn how these self-care strategies may lead to less frequent and less severe migraines.

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Mild cognitive impairment (MCI)

Learn more about this stage between the typical memory loss related to aging and the…

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