Although cold sores can be embarrassing, they are extremely common. Many people have had at least one at some point. Cold sores are caused by the herpes simplex virus type 1 (HSV-1), which is very contagious. In the United States, nearly half of Americans between the …

If you’ve ever had a red, itchy bump on your skin that went away as quickly as it appeared, you may have had hives. About 20% of the general population will have hives at some point. Since they disappear on their own for most people …

Whiplash, also called neck sprain or neck strain, is an injury that occurs due to forceful, back-and-forth movement of the neck. It often affects the neck's discs, muscles, nerves, and tendons.

Most whiplash injuries are the result of a collision that involves sudden acceleration or deceleration …

Keratosis pilaris is a common condition where small, rough bumps form on the skin. They may look like goosebumps, which often occur as a result of emotions—such as fear—or extreme temperatures, but they can also be mistaken for small pimples. It can also resemble …

Pneumonia is one of the most common respiratory diseases, affecting millions worldwide each year. Although pneumonia generally falls into three broad categories, there are more than 30 causes of the disease. Identifying the cause of pneumonia is especially important for getting the proper treatment.

What Is …

Anemia is the most common blood disorder in the United States, affecting more than 3 million Americans and nearly 3 billion people worldwide in 2021. While anemia is preventable and treatable, it can cause serious health issues in more severe cases.

What Is Anemia?

Anemia occurs …

For the past four decades, HIV has been a major global public health issue. Worldwide, more than 40 million people have died from the disease. Since then, scientists have worked toward effective treatments, vaccines, and a cure. So far, there has only been one effective treatment …

If you want to improve your smile, you might consider trying snap-on veneers. Dental veneers are coverings that can cover up crooked, stained, or chipped teeth. However, they are often irreversible because you need a small amount of enamel removed from the teeth to accommodate the …

Worldwide, cat and dog allergies affect 10% to 20% of the population. Most people don’t realize that what causes the allergy is not the pet itself or even its fur — you’re allergic to a protein found in the pet’s dander, saliva, and even …

If you’ve ever had a sudden sharp pain in your lower back or hip that went down into your leg, you may have experienced sciatica nerve pain. Between 10% to 40% of the population experience sciatica during their lifetime. Sciatica before the age of 20 …