Bone bruising was a phenomenon that was not observed prior to magnetic resonance imaging, according to the International Society of Arthroscopy, Knee Surgery & Orthopaedic Sports Medicine. Bone marrow edema and bone bruising appear the same on MRI.

Human hair gets greasy when it is not washed enough, but some people naturally have oily scalps, even if they shampoo frequently. This can lead to a condition called seborrheic dermatitis, more commonly known as dandruff, according to the National Institutes of Health, or NIH.

Lithium carbonate is a medication used frequently as a first line treatment for bipolar disorder. It is toxic in high doses. Toxic levels are more likely with kidney or heart disease, dehydration, or use of diuretic drugs or ACE inhibitors, a class of drugs often used for high blood pressure.

Heartworms are microscopic parasites affecting canines, and are transmitted by mosquitoes. Heartgard Plus is a once-a-month beef-flavored chewable tablet containing the drugs ivermectin and pyrantal pamoate to prevent heartworms, and treat and control roundworms and hookworms.

Fluid under the eyes causes puffiness and swelling. Although genetic factors and aging render some more susceptible to fluid retention than others, certain style factors and health conditions influence fluid accumulation under the eyes.

Molds have several deleterious effects on human health. Pathogenic (disease-causing) molds gain access to the body in several ways, including through the foods we eat, through broken skin and the air we breathe.

The gallbladder is a pear-shaped sac located under the liver on the upper right side of the abdomen, according to MayoClinic.com. The liver produces bile—a digestive fluid that aids in the digestion of fat—and the gallbladder stores it.

During a typical monthly menstrual cycle, a woman ovulates and her uterine lining thickens to prepare for conception. If pregnancy does not occur, the built-up tissue of the uterine lining is shed with the menstrual flow and a new cycle begins.

The human body contains many thousands of different types of proteins. Each protein has its own job to do, such as clotting blood, regulating metabolism, and fighting off bacterial and viral infections. The total protein blood test measures the amount of all proteins found in the liquid part of the blood.

Deep breathing can release stress and provide other noticeable health benefits. You will likely feel calmer after performing deep breathing exercises, and may trade feelings of anger or fear for a focused, relaxed state of mind.

If you told a group of well-meaning friends that you had a pain in one side of your buttocks and the back of your thigh, one might suggest that you that you have "sciatica." But do you? How do you know it's not just a pulled muscle, or bursitis or some other less nefarious condition?

Muscle injuries are known as strains, but knee sprains result from ligament injuries. Ligaments support the joints in your body and connect your bones to each other. Formed from fibrous tissue, ligaments stretch much like elastic. Most sprains occur in the ankle, knee or wrist and result from sports activities.