The urinal bladder can become infected with bacteria that normally inhabit the intestinal tract. Bladder infection is much more common in women than in men because a woman's urethra—the passage...

Alzheimer disease is a progressive deterioration of the brain, resulting in decreased mental powers. It most often strikes after age 65 and is the fourth leading cause of death among...

Anxiety is the body and mind's response to a dangerous or distressing situation. Everyone experiences some degree of anxiety at some time. However, anxiety can occur persistently, often triggered by...

An allergy is a super-sensitivity of the body's immune system to certain substances such as foods, chemicals, dust mites, pollen, or animal dander. Exposure to the allergen (the material that...