Nitric oxide isn’t a nutrient you’ll find on food packaging — but it plays a critical role in how your body moves, recovers, and circulates blood. This molecule helps blood vessels relax and widen, ...

In 1968, Dr. Richard Hornberger wrote a novel under the pseudonym Richard Hooker, using his experiences in a Mobile Army Surgical Hospital in the Korean War. Several years later, his novel served as ...

Lymphoma is a cancer that originates in the lymphatic system, a vital part of the body’s immune defenses. This system includes lymph nodes, vessels, and tissues found in the bone marrow, spleen, ...

A wide range of psychological disorders can lead to feelings of dysphoria, a sensation often described as an overwhelming sense of dissatisfaction with life in general. For those who experience it, it ...

Picture an unexpected, severe pain gripping your lower abdomen—a pain that stops you in your tracks. While it may feel like just another cramp, it could be a sign of something far more dangerous: ...

Choleric is one of the four cornerstones of humorism. Also called the humoral theory, this system of medicine attempted to explain many of the conditions that could affect the body. Though Ancient ...

Hypervigilance is a symptom of many anxiety disorders but is most commonly associated with post-traumatic stress disorder or PTSD — it is part of the condition's diagnostic criteria. Someone ...

Mottled skin, a piebald-like purple or blue coloration on the skin, is caused by a vascular condition. The discoloration often resembles a web or lace-like pattern. Mottled skin usually develops on ...

Because of the COVID-19 pandemic and the threat of many other infectious diseases, scientists have begun looking more closely at what causes diseases to spread and what characterizes a person’s ...

Although their functions may appear simple, the ureters perform essential excretory work for the body. These two slender tubes transport urine from the kidneys to the bladder. The ureters use a ...

I Dream of Jeannie was a hit show of the late 60s — the sitcom about the astronaut-turned-master of a 2000-year-old blonde genie was a staple of family-friendly television. Barbara Eden was ...

Glomeruli are clusters of small blood vessels in the kidney that allow waste to pass from the blood and into the urine. Glomerulonephritis occurs when the glomeruli swell, damaging the kidneys and ...