DHEA is an abbreviation for dehydroepiandrosterone, a hormone produced by your adrenal glands. Your adrenals are located above your kidneys.

Anemia is most often caused by low iron or vitamin B levels in the blood. During pregnancy, the volume of blood in your body expands by about 50 percent, so you need extra iron to prevent anemia. According to the BabyCenter.

In their simplest, most basic forms, hematomas are simply bruises. The prefix "hema," in fact, means blood. You get a hematoma when blood vessels break. Breaking of blood vessels causes blood to leak out and gather at the surface of your skin.

An aneurysm is a pathologic dilatation of a blood vessel due to weakening of the vessel’s wall. The abdominal aorta is a major artery, which arises directly from the heart and supplies blood to the bottom half of your body. Abdominal aortic aneurysms are usually asymptomatic until serious complications arise.

Poor circulation occurs when insufficient blood flows to your extremities, according to the UAB Health System.

The circulation of blood into and out of the heart is critical for health. Blood flows throughout the body courtesy of the pumping action of the heart. The blood carries oxygen to the body's tissues through blood vessels, consisting of arteries and capillaries.

Approximately two-thirds of the total iron in our bodies can be found in the oxygen-carrying protein of red blood cells known as hemoglobin, according to the National Institutes of Health Office of Dietary Supplements.

A bruise, which is also called a contusion, occurs when the blood vessels leak blood. This usually happens due to an injury that causes the blood vessels to break. As blood enters the tissues, a bruise forms. Over time the area heals, the body reabsorbs the blood and the bruise disappears.

Ligaments are dense fibrous connective tissues that join bones. Ligaments occur throughout the body wherever there are joints, and they can be very complex.

According to the Mayo Clinic, elevated platelet count, also known as thrombocytosis, is a disorder in which excess platelets are produced, leading to abnormal blood clotting or bleeding. Platelets are small fragments of the red blood cells produced in bone marrow.

Blood type diets focus on how specific foods effect people with different blood types. Dr. D’Adamo, creator of the Geno Type Diet, researched the origins of each human blood type and constructed eating plans to optimize health and help dieters lose excess weight.

It's not unusual for anyone to have cold hands in the wintertime, but getting cold hands even when it's not that cold out can be a sign of poor circulation--or a more severe condition. Select gloves that are snug, but not too tight.