The veins on the back of your hand may appear blue if you have light-colored skin. That's an illusion due to the way light is absorbed by the skin. In people with darker skin tones, veins tend to ...

Swelling can occur in one or both of your ankles. The skin around your ankles may also look ... can cause your ankles to ...

which stretches veins and even slowly leaks into ankle and leg tissue, causing swelling. Aside from the "purple snake" effect, varicose veins can cramp or throb at night. So much blood pools into ...

Hemorrhoids are swollen veins around the rectum or anus. They can become very uncomfortable but are not life threatening. They’re categorized by grades that rank them in order of severity.

The attack at the Boston Marathon nearly killed her. Two years later and five thousand miles away, a violent encounter with a shark took his leg. Had either event not occurred, they wouldn’t be ...

The Dark Tetrad, also known as the Dark Quad, is a set of interrelated negative personality features: narcissism, psychopathy, Machiavellianism, and sadism. The term is an expansion of the idea of ...

As dark sky sanctuaries grow in popularity, scientists are revealing more of the benefits of darkness—from repairing DNA to improving your mental health. A panorama of dark skies over the desert ...

To understand why dark matter is such a challenge for scientists, consider that all the matter wrapped up in everything we see around us — from stars, planets, and moons down to humans ...

Venous insufficiency: Blood pools in the veins, preventing the blood from being properly transported to the feet and back up to the heart. This causes water retention in the ankles, lower legs ...

The term “Dark Triad” refers to a trio of negative personality traits—narcissism, Machiavellianism, and psychopathy—which share some common malevolent features. The construct was coined by ...