Viruses are microscopic agents that replicate in the body's cells and are responsible for a bevy of infections and diseases, including chickenpox, AIDS and the common cold. Although bacterial infections may be treated with antibiotics, viral infections cannot.

According to HealthScout.com, a rotator cuff injury is one of the most common shoulder injuries. It often makes it painful and difficult to move the injured arm or shoulder until the muscles have strengthened and the injury has healed.

Damage to your nerves can occur from traumatic injury and disease. Nerve damage can cause pain, numbness and tingling as well as lack of coordination, mobility or strength. Research shows that exercise and repetitive movement might help regenerate nerve cells and improve nervous system signaling.

Hip replacement surgery can restore your mobility after a hip fracture, or after the surgical replacement of a joint damaged by arthritis. Doctors replace the hip joint with an artificial joint. After several days hospitalization, you'll return home to continue your recovery.

The rotator cuff is the group of small muscles and tendons that move and stabilize your arm within your shallow shoulder socket. Because the rotator cuff permits a wide range of shoulder motions, injuries are common.

Edema is swelling caused by the build up of fluid in the cells or tissues. In acute periorbital edema, the eyelids and area around the eye are swollen. There are various causes for this disorder.

Knee pain has many different causes, and the recommendations of allowed activities vary with each problem. If the knee pain is related to overuse injury, arthritis, or a mechanical problem, a StairMaster may not be recommended and may irritate the problem further.

Partial or unicompartmental knee replacement is a surgical procedure used to increase knee function and alleviate chronic knee pain in affected people. During this procedure, a surgeon specifically replaces the damaged portions of the knee, while keeping all healthy bone and cartilage intact.

Purines are part of the structure of nucleic acids, molecules that make up DNA. They're present in every cell in the human body. When purines break down, they form uric acid, a waste product normally excreted by the kidneys. Gout is a condition that results from a buildup of uric acid in the body.

While tennis elbow, also known as lateral epicondylitis, is a common affliction among players, anybody whose physical routine involves repetitive arm and elbow motions can become afflicted.

Everyone experiences joint popping occasionally, and stair climbing stretches the tendons in your knees in a way that may produce a such a sound. If the phenomenon is infrequent, it is usually harmless.

Range of motion, or ROM, refers to how far a joint moves during exercise and physical therapy. Muscle strength and flexibility are the key components to movement. Lack of activity due to injury or disease lead to a decline in these two vital functions.