Dandruff is a harmless, chronic condition that occurs when the scalp becomes dry or greasy and produces white flakes of dead skin that appear

Two-thirds of the human body is made up of water. That means that if a person weighs about 70 kilograms (154 pounds), their body contains

Dementia is not a specific disease, but a general term that describes a gradual decline of mental ability that affects your intellectual and social

Everyone feels sad or down at times, especially after experiencing a disappointment such as not getting the job you interviewed for. However, these feelings

Diabetes is a condition where people don’t produce enough insulin to meet their body’s needs and/or their cells don’t respond properly to insulin. Insulin

Diabetic ketoacidosis (DKA) is a potentially lifethreatening complication that may occur in people who have diabetes, most often in those who have type 1

A diaper rash is an area of inflamed skin found in the diaper area in infants and young children. It is usually caused by

Diarrhea is a symptom, not a disease. It is defined as passing frequent (3 or more per day) loose or watery stools. The acute

Diverticula are sacs formed by a fold of the lining of the intestinal wall. They project from within the bowel through the muscle surrounding

Chromosomes are tiny structures found in every cell of our bodies. These structures hold the DNA genetic codes that dictate our natural traits and

Dry eye disease (DED), also known as dry eye syndrome or dysfunctional tear syndrome, is a condition that involves the tears and the surface

Dry mouth is usually a temporary condition caused when the salivary glands don’t produce enough saliva. It’s a common side effect of many prescription

Many people have spent a tropical vacation with a bad stomach bug. They might have had dysentery, a painful intestinal infection that is usually

Dysmenorrhea can be literally translated as “difficult monthly flow.” Although it’s normal for most women to have mild abdominal cramps on the first day

Persistent depressive disorder, also known as dysthymia, is a mood or affective disorder. It is a chronic, mild depression that lasts for a long