Bleeding occurs when trauma damages a blood vessel. When that trauma involves your head—whether the scalp, skull, or brain—it’s considered a head injury. These head injuries range in severity from a ...

The human circulatory system represents an intricate network of vessels that extends throughout the entire body. This complex arrangement of arteries, veins, and capillaries works continuously to ...

Varicose veins are swollen, twisted veins caused by weakened valves that allow blood to pool. While often a cosmetic issue, they can pose health risks like blood clots and skin ulcers. Self-care ...

Researchers are shifting focus from large arteries to microvessels, where nitric oxide activity may signal early circulatory changes before symptoms appear. Nitric oxide is a signaling molecule ...