When you're trying to make heart-healthy changes to your lifestyle and diet, it's helpful to know some basics about nutrition.

Systemic lupus erythematosus (lupus) is a disease that causes your body's immune system to attack its own cells and tissues. It causes periods of inflammation to various parts of the body. It can affect your joints, tendons, and skin. It can affect blood vessels. And it can affect organs, such as the kidneys, heart, lungs, and brain.

Atherosclerosis is a type of thickening or hardening of the arteries caused by a buildup of plaque in the inner lining of an artery. It can increase your risk of heart attack, stroke, and other circulatory conditions.

Diagnosing arthritis and other rheumatic diseases is often difficult, as many symptoms are similar among the different diseases.

Hypnosis is an altered, relaxed state of mind. It is often used to help learn to control bad habits, pain, and stress.

Nipple conditions are a common noncancer (benign) breast condition affecting many people assigned female at birth. Some problems are related to lactation, and others are not.

Detailed information on lactose intolerance, including a list of foods that contain lactose.

Breast development happens in certain stages during a woman's life: first before birth, and again at puberty and later during the childbearing years. Changes also happen to the breasts during menstruation and when a woman reaches menopause.

The two most common types of benign breast lumps are cysts and fibroadenomas. A cyst is a fluid-filled sac that develops in the breast tissue. Fibroadenomas are solid, smooth, firm, benign lumps that are most commonly found in women in their late teens and early 20s.

The most common type of breast infection is lactational mastitis. This happens when a woman is breastfeeding. The nipples become cracked and sore, allowing bacteria from the baby's mouth to enter the ducts and rapidly multiply in the milk.