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.

Your psoas muscles are the muscles located in the front of your hip area. These muscles are responsible for helping you lift your leg and move your torso toward your thighs. If you experience a muscle cramp in the psoas area, a number of things could be to blame.

The scapula is a flat bone in the back of the shoulder that is often referred to as the shoulder blade. Pain in this region is often the result of tight muscles or injury to the rotator cuff -- a small grouping of muscles that allow you to move your shoulder in multiple directions.

Ligaments and tendons are part of the musculoskeletal system, with ligaments attaching bones to bones and tendons muscles to bones.They each serve very important functions to the joints and bones. Ligaments and tendons are made of dense layered collagen fibers, called fibrous connective tissue.

While seafood is often seen as a healthy food overall, certain fatty fish like salmon, tuna, and sardines are promoted specifically for their anti-inflammatory omega-3 properties. Shellfish such as shrimp, however, usually do not make that list.

The meniscus, which is a structure located within the knee joint, is a common site for injuries. Treatment for a damaged meniscus depends on the severity and cause of the injury; your physician can help determine the best course of treatment.

Swelling and inflammation are common symptoms of seafood allergies, according to MayoClinc.com. Although most swelling occurs in the skin, the sinuses and the lungs, if you have any joint conditions -- such as arthritis -- you may develop joint pain.

Pain in the hip from a pinched nerve can be temporary, or the result of a longer-term condition such as sciatica, which results when the sciatic nerve becomes trapped between two muscles or muscle and bone. Stretching is a beneficial way of lengthening and loosening the muscle that may be putting pressure on the nerve.

Calcium is a mineral important to a number of our normal bodily functions. Its concentration in your blood is only normal within a very narrow range. Too much calcium, which is usually caused by dysregulation of your parathyroid gland, can cause a number of symptoms, including joint pain.

Many conditions can cause chronic knee and leg pain. According to MayoClinic.com, knee pain, including chronic or long-standing knee pain, can be caused by traumatic injuries, overuse injuries and certain medical conditions.

Androgens are the group of male hormones that include testosterone. Excess production can lead to a number of hormonal disorders like polycystic ovary syndrome and might even increase cancer risk.

Subluxation -- a less than full dislocation of a joint -- occurs when movement of a joint goes beyond its maximum range causing the bones to move out of alignment. Subluxations commonly occur in the sacroiliac (SI) joint, which is formed by the bottom of your spine and your pelvis.