Appendicitis is an inflamed appendix. It can cause acute (sudden, intense) pain in your lower abdomen. Your appendix is a small, tubular pouch, about the size of a finger, that protrudes from the lower right end of your large intestine. Poop (feces) moving through your large intestine can block or infect your appendix, leading to inflammation. Inflammation causes your appendix to swell, and when …

Your aorta is the largest artery in your body. It carries blood and oxygen from your heart to other parts of your body. It’s shaped like a curved candy cane. Your ascending aorta leads up from your heart. Your descending aorta travels back down into your abdomen (belly).

Coarctation of the aorta is a congenital (present at birth) heart defect. It’s also called aortic coarctation (pronounced “ay-or-tuhk” “koh-ark-TEY-shun”). This defect affects your baby’s aorta, which is the largest artery in their body. It carries oxygen-rich blood from your baby’s heart to the rest of their body. If your baby has aortic coarctation, one part of their aorta is narrower …

An aortic dissection is a tear in your aorta. This is the main artery that carries oxygen-rich blood away from your heart to the rest of your body. It runs through your chest and abdomen and down to your legs. A rare condition, an aortic dissection begins abruptly when a tear happens in the inner layer of a weakened area of your aorta. Blood surges …

Aortic valve disease is a group of conditions that affect your aortic valve and prevent it from working as it should. Your aortic valve is the “door” that manages blood flow out of your heart to the rest of your body. This valve allows blood to travel from your heart’s main pumping chamber (left ventricle) into a large artery called your aorta. From there, your blood travels …

Aortic regurgitation, also called aortic regurgitation, refers to a leaky aortic valve. With this condition, the leaflets or cusps of your heart’s aortic valve don’t close as tightly as they should. As a result, some blood that should move out of your heart leaks backward each time your heart beats. Your aortic valve is the “door” that opens and closes to control …

Aortic valve stenosis (or aortic stenosis) describes an aortic valve in your heart that’s narrowed or blocked. This interferes with the normal blood flow out of your heart. Because this condition restricts blood flow, it also limits how much oxygen your body gets. This can cause chest pain, shortness of breath and fainting. Aortic stenosis can cause heart damage, major health problems and even death. …

Anorexia (anorexia nervosa) is an eating disorder in which you restrict the number of calories you consume, resulting in a nutrient deficit and often — but not always — a very low body weight. People with anorexia also have an intense fear of gaining weight and a distorted body image. They often don’t recognize the seriousness of the condition. If you think frequently about food …

Anorgasmia is delayed, infrequent or absent orgasms — or significantly less-intense orgasms — after sexual arousal and adequate sexual stimulation. Women who have problems with orgasms and who feel significant distress about those problems may be diagnosed with anorgasmia. Among all women, the frequency and intensity of orgasms vary. Also, for any individual, orgasms can be different from one time …

Anterior vaginal prolapse, also known as a cystocele (SIS-toe-seel) or a prolapsed bladder, is when the bladder drops from its usual position in the pelvis and pushes on the wall of the vagina. The organs of the pelvis — including the bladder, uterus and intestines — are typically held in place by the muscles and connective tissues of the pelvic …