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MedlinePlus is a service of the National Library of Medicine (NLM), the world's largest medical library, which is part of the National Institutes of Health (NIH). It was built as an online health information resource for patients and their families and friends.

MedlinePlus presents high-quality, easy to understand, relevant health and wellness information that is trusted.

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Sun Exposure - National Library of Medicine

Welcome to NewMedicalTerms, your ultimate guide to the explanations and definitions of the majority of medical terms you may see.

... sun when it is strongest (between 10 a.m. and 2 p.m.) Use sunscreen with an SPF of 15 or ...

Tanning - National Library of Medicine

Welcome to NewMedicalTerms, your ultimate guide to the explanations and definitions of the majority of medical terms you may see.

... stay out of the sun between 10 a.m. and 4 p.m., when its rays are strongest. But remember that ...

Cervical Cancer Screening - National Library of Medicine

Welcome to NewMedicalTerms, your ultimate guide to the explanations and definitions of the majority of medical terms you may see.

The cervix is the lower part of the uterus, the place where a baby grows during pregnancy. Cancer screening is looking for cancer before you have any symptoms. ...

Dwarfism - National Library of Medicine

Welcome to NewMedicalTerms, your ultimate guide to the explanations and definitions of the majority of medical terms you may see.

People with dwarfism have short stature. This means that their height is under 4' 10" as an adult. They are usually of normal intelligence. Dwarfism most often ...

Healthy Sleep - National Library of Medicine

Welcome to NewMedicalTerms, your ultimate guide to the explanations and definitions of the majority of medical terms you may see.

... Don't take a nap after 3 p.m. Relax before bed, for example by taking a ...

Stress - National Library of Medicine

Welcome to NewMedicalTerms, your ultimate guide to the explanations and definitions of the majority of medical terms you may see.

What is stress? Stress is how your brain and body respond to a challenge or demand. When you are stressed, your body releases chemicals called hormones. ...

Teen Mental Health - National Library of Medicine

Welcome to NewMedicalTerms, your ultimate guide to the explanations and definitions of the majority of medical terms you may see.

Being a teenager is hard. You're under stress to be liked, do well in school, get along with your family, and make big decisions. You can't avoid most of these ...

Underage Drinking - National Library of Medicine

Welcome to NewMedicalTerms, your ultimate guide to the explanations and definitions of the majority of medical terms you may see.

Alcohol is the most widely misused substance among America's youth. Drinking by young people has big health and safety risks. It is dangerous because it: Causes ...

Colorectal Cancer - National Library of Medicine

Welcome to NewMedicalTerms, your ultimate guide to the explanations and definitions of the majority of medical terms you may see.

The colon and rectum are part of the large intestine. Colorectal cancer occurs when tumors form in the lining of the large intestine. It is common in both ...