Diabetic neuropathy is nerve damage that can happen when you have diabetes that's not well controlled. It can happen in many ways, and they all seem to be related to blood sugar levels being too high ...

Bleach and other chemical hair treatments like permanents weaken your hair, so it's more likely to break before it grows to your longed-for length. If you choose a hue not too far from your natural ...

A few decades ago, most people had never heard of autism. Now, you probably hear about it regularly. Autism is short for autism spectrum disorder (ASD). It's a group of neurodevelopmental (or brain ...

Vascular disease is any condition that affects the network of your blood vessels. This network is known as your vascular or circulatory system. "Vascular" comes from a Latin word for hollow container.

What Is de Quervain's Tenosynovitis? De Quervain's tenosynovitis is inflammation around the tendons in your thumb that leads to painful swelling. It's also called de Quervain's tendinosis or de ...

A man may ejaculate 40 million to 150 million sperm, which start swimming upstream toward the fallopian tubes on their mission to fertilize an egg. Fast-swimming sperm can reach the egg in a half an ...

Myocarditis is inflammation of the heart muscle (also called myocardium). Researchers think that it affects 1.5 million people around the world each year. This means that 1 or 2 out of every 10,000 ...

Testosterone is a hormone produced by the testicles and is responsible for the proper development of male sexual characteristics. Testosterone is also important for maintaining muscle bulk, adequate ...

Propofol is a strong anesthetic that's used for surgery, some medical exams, and for sedation for people on ventilators -- never as a sleep aid. It's given by IV and should only be administered by a ...

Cytolytic vaginosis, which is sometimes called "lactobacillus overgrowth syndrome" or "Doderlein's cytolysis," is thought to happen when too much of a certain type of bacteria grows in your vagina.

Fatigue is a common effect of low testosterone. You might feel like you just don't have the energy that you're used to. Or you might be incredibly tired. But many other things can sap your energy, too ...

Learn about the anatomy of your eyes and how each part of the eye works in order to create visual output.