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.
Military service members and veterans have made sacrifices to our country, and they may face lots of different health issues. Some of the most common health problems ...
What are viruses? Viruses are very tiny germs. They are made of genetic material (either DNA or RNA) inside of a protein coating. There are a huge number ...
What is vision impairment? Vision impairment is the loss of vision. It includes blindness, which means that you have lost all or most of your sight. It ...
Your vital signs show how well your body is functioning. They are usually measured at doctor's offices, often as part of a health checkup, or during an emergency ...
Vitamins are substances that your body needs to grow and develop normally. Vitamin A plays a role in your: Vision Bone growth Reproduction Cell functions Immune ...
Vitamins are substances that your body needs to grow and develop normally. Vitamin C is an antioxidant. It is important for your skin, bones, and connective tissue. ...
Why do I need vitamin D? Vitamins are substances that your body needs to grow and develop normally. Vitamin D is important to your body because: It helps ...
What is vitamin D deficiency? Vitamin D deficiency means that your body is not getting enough vitamin D to stay healthy.Why do I need vitamin D and how ...
Vitamins are substances that your body needs to grow and develop normally. Vitamin E is an antioxidant. It plays a role in your immune system and metabolic processes. ...
Vitamins are substances that your body needs to grow and develop normally. Vitamin K helps your body by making proteins for healthy bones and tissues. It also ...
Vitamins are substances that your body needs to grow and develop normally. There are 13 vitamins your body needs. They are: Vitamin A B vitamins (thiamine, riboflavin, ...
Vitiligo causes white patches on your skin. It can also affect your eyes, mouth, and nose. It occurs when the cells that give your skin its color are destroyed. ...
What is cholesterol? Cholesterol is a waxy, fat-like substance that's found in all the cells in your body. Your liver makes cholesterol, and it is also ...
Voice is the sound made by air passing from your lungs through your larynx, or voice box. In your larynx are your vocal cords, two bands of muscle that vibrate ...
A volcano is a vent in the Earth's crust. Hot rock, steam, poisonous gases, and ash reach the Earth's surface when a volcano erupts. An eruption can also ...
What is Von Hippel-Lindau disease (VHL)? Von Hippel-Lindau disease (VHL) is a rare disease that causes tumors and cysts to grow in your body. They can grow ...
Vulvar cancer is a rare type of cancer. It forms in a woman's external genitals, called the vulva. The cancer usually grows slowly over several years. First, ...
The vulva is the external part of a woman's genitals. Some problems you can have with the vulvar area include: Vaginitis or vulvovaginitis, swelling or infection ...
What are walking problems? If you are like most people, you walk thousands of steps each day. You walk to do your daily activities, get around, and exercise. ...
Warts are growths on your skin caused by an infection with humanpapilloma virus, or HPV. Types of warts include : Common warts, which often appear on your fingers ...