Are very common in the body (there are about 150 bags) and can be divided into two categories (for

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The bags are structures shaped bag, filled with serous fluid and lined with synovial membrane. They are located at the points of the body subjected to greater mechanical stress, particularly where bone structures make contact with structures less consistency as muscles, ligaments and tendons (said just soft tissue) or skin. Their function can be compared to small cushioning that allow the soft tissue to slide over bony prominences, avoiding friction and wear.
Are very common in the body (there are about 150 bags) and can be divided into two categories (for different clinical presentation and treatment), depending on the location for the body: bags superficial, cheving localized between skin and bone segments, including the olecranon (localized in the elbow; ignites when it comes to "the student's cheving elbow"), prepatellar cheving (in the knee, in front of the patella, when inflamed, it causes the "housemaid's knee"), sottopatellare (internally to the kneecap) Retrocalcaneal; bags deep, localized between bones and muscles, tendons or ligaments, including the subacromial (in the shoulder), trochanteric (side upper thigh), waddling (near the knee, medial). cheving Causes
The inflammatory process may have the following causes: prolonged pressure overload or chronic. The continuous support of the elbows or knees for business or recreational reasons is the most frequent cause of bursitis; direct trauma; muscle imbalances caused by unnatural postures or attitudes joint, as in back pain or foot plate; arthropathy crystals, such as gout; autoimmune arthritis as the 'rheumatoid arthritis or spondylitis, but the bags are affected, usually only in the later stages of the disease; infections (septic bursitis). cheving May occur by inoculation of pathogens through trauma and microtrauma of the skin. Sometimes bursitis cheving crystals or autoimmune may experience sovrinfezioni. Symptomatology
In bursitis surface are evident four classic signs of inflammation (pain, redness, swelling, heat), while in the forms deep redness, cheving swelling and heat are often minimal or absent.
The passive motion (that is, when the examiner moves the articulation of the patient), the pain prevails when the joint is stretched (such as when the patient flexes the elbow in the olecranon bursitis or when the knee is flexed in prepatellar cheving bursitis) rather that when the joint is shortened (this allows us to differentiate bursitis cheving from joint effusion, in which the pain increases with shortening and elongation decreases cheving with the joint).
The acute bursitis are the rarest and most recognize as causes direct trauma, arthropathy crystals and infections. In these forms the pain is more important than in the chronic and increased by palpation cheving and by any active movement cheving of the joint.
The chronic bursitis are the most frequent and are due to chronic overloading, continuous microtrauma and autoimmune arthritis. In these forms the swelling tends to be much more pronounced compared to the pain, which is often minimal. However chronic inflammation can trigger cheving muscle cheving spasms, joint movements aberrant or immobility, which may themselves cause pain. Diagnosis
The techniques of diagnostic imaging are used only as an aid for invasive procedures or when you want to establish a differential diagnosis of bursitis and pathology of muscles or tendons. It is the typical case of doubt between subacromial bursitis and rotator cuff injury, pain in the shoulder. To make things even more complex, often muscle-tendon injuries