Tennis elbow, or lateral epicondilytis, is characterized by painful inflammation of tendons in the elbow. Any repetitive motion can cause development of tennis elbow, from tennis to typing.

The knees are subject to many types of mechanical and physical stress, which makes them vulnerable to several conditions. Four fluid-filled sacs called bursae occupy various sites at the front of the knee. These small sacs cushion knee bones and tendons, and reduce friction in the joint.

The sciatic nerve is one of the largest nerves in the body because it connects the spinal cord to the pelvis and legs. Because of its size and the fact that it exits the spinal column at the bottom and runs through the pelvis, the sciatic nerve can easily become pinched, resulting in a condition known as sciatica.

The hip joint is a stable ball-and-socket joint. Dislocations of this joint rarely occur without other injuries, such as a broken thigh bone or pelvis. These injuries are typically caused by high-impact trauma such as a car or bike accident or a fall from a significant height.

Nerve pain in the thigh is often caused by the pressure put on a nerve in another part of the body, such as occurs with sciatica. Sciatica is actually a pinched nerve in the lower back, but the pain radiates down the leg into the thigh.

Shoulder ligaments are fibrous bands that hold the bones of the region together and stabilize the shoulder joints. Sports injuries, trauma and repetitive stress can cause tears in one or more of the shoulder ligaments. These tears range from mild to severe.

Knee tendonitis is an inflammation of the knee tendons. The knee is the most vital joint in your body. If the tendons are inflamed, it can cause pain and hinder movement. There are a variety of exercises you can do to relieve the pain of knee tendonitis.

Spots on the feet can be unsightly and irritating, especially if they are inflamed or sensitive to the touch. They can develop on the underside of the feet due to several medical conditions and illnesses—some that must be treated by a doctor.

Pain in the front of the knee is most often associated with the patella or kneecap, and is generally classified as patellofemoral pain. According to the American Academy of Orthopaedic Surgeons, contributing factors to patellofemoral pain include overuse, muscle imbalance and inadequate stretching.

Gout is an arthritic condition afflicting as many as 5 million Americans, according to Johns Hopkins Medicine. Some evidence exists that it can worsen or improve, depending on your diet. Foods high in purine, an amino acid, may aggravate it, and avoiding these foods can potentially limit attacks.

Numerous conditions cause high levels of creatinine and uric acid in your body. According to the MedlinePlus website, creatinine is a breakdown product of creatine, an important part of your muscles.

A slipped disc in your jaw can cause painful temporomandibular joint (TMJ)-related problems, including a “popping” noise that originates inside the jaw joint. Surgery is often used to treat TMJ.