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Bipolar disorder involves periods of excitability (mania) alternating with periods of depression. The "mood swings" between mania and depression can be very abrupt.

Adolescent pregnancy is pregnancy in girls age 19 or younger.

Diabetes is a chronic (lifelong) disease marked by high levels of sugar in the blood. See also: Gestational diabetes; Type 1 diabetes; Type 2 diabetes; Metabolic syndrome.

Depression may be described as feeling sad, blue, unhappy, miserable, or down in the dumps. Most of us feel this way at one time or another for short periods. True clinical depression is a mood disorder in which feelings of sadness, loss, anger, o...

Hypertension is the term used to describe high blood pressure. Blood pressure readings are measured in millimeters of mercury (mmHg) and usually given as two numbers. For example, 120 over 80 (written as 120/80 mmHg. The top number is your systoli...

Breast cancer is a cancer that starts in the tissues of the breast. There are two main types of breast cancer: Ductal carcinoma starts in the tubes (ducts) that move milk from the breast to the nipple. Most breast cancers are of this type; Lobular...

A waxy substance in the chemical family of alcohols synthesized in the liver and used by the body to produce bile, hormones, and nerve tissue Cholesterol is a critically important compound in the human body. It is synthesized in the liver and used...

An allergy is an exaggerated immune response or reaction to substances that are generally not harmful. See also: Allergic conjunctivitis; Allergic reactions; Allergy testing; Allergy to mold, dander, dust; Atopic dermatitis (eczema; Contact dermat...