Excessive, ongoing anxiety and worry can interfere with your daily activities and may be a sign of generalized anxiety disorder, but treatment can help.
Disease
Gestational diabetes
This high blood sugar disorder develops during pregnancy and can affect your pregnancy and your baby's health. Read about risks, prevention and treatment.
Disease
Graves' disease
Learn about the symptoms, causes and treatment of this immune system condition that results in too much thyroid hormone.
Disease
Group B strep disease
This common type of bacteria is often harmless in healthy adults. But it can cause serious illness in newborns and adults with certain long-term conditions, such as diabetes.
Disease
Hand-foot-and-mouth disease
Learn about the symptoms and treatment of this contagious viral infection. It is marked by sores in the mouth and a rash on the hands and feet.
Disease
Hashimoto's disease
Learn about the symptoms and treatment of this thyroid disorder caused by an immune-system dysfunction.
Disease
Heart disease
Learn about symptoms, causes and treatment of cardiovascular disease, a term describing a wide range of conditions that can affect the heart.
Disease
Heart valve disease
Learn about this condition in which one or more of the heart valves doesn't work properly.
Disease
Herniated disk
This condition occurs most often in the lower back. In many cases, it causes no symptoms and requires no treatment. Surgery is rarely needed.
Disease
Hip dysplasia
In infancy, this condition often can be corrected with a soft brace. Older children and young adults might require surgery to correct the misalignment.
Disease
Hirschsprung's disease
This digestive disorder that's present at birth affects the nerves in the colon. It causes severe constipation but can be treated.
Disease
Hoarding disorder
This mental health condition involves ongoing difficulty parting with possessions, leading to severe clutter and a risk to safety.