Seasonal affective disorder (SAD) is a type of depression that’s related to changes in seasons – SAD begins and ends about the same times every year. If you’re like most people with SAD, your symptoms start in the fall and continue into the winter months, sapping your energy and making you feel moody. Less often, SAD causes depression in the spring or early summer. More...

Leukemia is cancer of the body’s blood-forming tissues, including the bone marrow and the lymphatic system. Many types of leukemia exist. Some forms of leukemia are more common in children. Other forms of leukemia occur mostly in adults. More...

Are you holding the newspaper farther away from your eyes than you used to? Join the crowd—age can bring changes that affect your eyesight. Some changes are more serious than others, but for many problems, there are things you can do to protect your vision. More...

Sciatica refers to pain that radiates along the path of the sciatic nerve, which branches from your lower back through your hips and buttocks and down each leg. Typically, sciatica affects only one side of your body. More...