The Eastern equine encephalitis virus is spread by mosquitoes and, in rare cases, can lead to a life-threatening brain infection.

People with cystic fibrosis produce a thick, sticky mucus that causes wide-ranging problems in the lungs, pancreas and digestive system.

Psoriasis causes new skin cells to grow in days rather than weeks. New skin builds up rapidly, forming thick patches and scales on the surface.

Osteoporosis is most common in postmenopausal women and may occur without much warning.

A rare psychological occurrence, Stockholm syndrome is when hostages develop positive feelings toward their captors during an abduction incident.

Alzheimer's disease, the most common form of dementia, causes memory and thinking problems, as well as behavioral changes in older adults.

Why is keeping the balance of sodium in our bodies so important?

About 60,000 Americans are diagnosed with Parkinson's disease each year.

Hand, foot and mouth disease can spread quickly across child care centers and elementary schools. Here's what to look for and how to manage the disease.

What is happening when something as lovely as ice cream causes such awful pain?

A woman's body goes through a number of changes in the earliest stages of pregnancy. Here are 10 clues to help a woman figure out whether she's pregnant.

There are several things a man can do to increase the chances that he will get a woman pregnant.