An electrocardiogram, called an EKG or ECG, measures the electrical activity of the heart and collects data about heart's health. Typically, a doctor or technician places electrodes connected to a ...

Most women may not realize it, but as we get older, our face changes shape. Once we reach our fifties, the hairstyles we’ve worn for years may not sit or look the same as they did before. A new ...

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, ...

Peripheral neuropathy is a broad term for any condition that damages the peripheral nerves that transfer sensory information and carry signals from the central nervous system in the brain and spinal ...

Ammonia is a chemical that both occurs naturally and can be created. It is a colorless gas — one part nitrogen and three parts hydrogen — with a foul smell that most people easily recognize.

Locked-in syndrome is a complex condition with many causes. People in this so-called pseudocoma can think, but they experience complete paralysis of all voluntary muscles. They can reason, but they ...

The back bears a large portion of the body’s weight when we walk, run, lift items, and perform various other activities. Because the back has to bear this stress, back injuries and pain are among the ...

The good news: blue waffle disease isn't a real STI. Back in 2010, this urban legend began with a photograph showing an infected vagina with a blue labia. While there's no definitive information about ...

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 ...

Upper respiratory infections (URI's) illnesses develop due to acute infection, most often a virus but also, potentially, bacteria. The nose, larynx, pharynx, and sinuses are affected by URIs. Symptoms ...

Vasodilation is the widening of the blood vessels, a process that happens naturally in response to various conditions to ensure blood flow is directed to where it is needed. Vasodilation can be useful ...

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 ...