Bursitis is the
inflammation
Inflammation (from la, inflammatio) is part of the complex biological response of body tissues to harmful stimuli, such as pathogens, damaged cells, or irritants, and is a protective response involving immune cells, blood vessels, and molec ...
of one or more
bursae (fluid filled sacs) of
synovial fluid
Synovial fluid, also called synovia, elp 1/sup> is a viscous, non-Newtonian fluid found in the cavities of synovial joints. With its egg white–like consistency, the principal role of synovial fluid is to reduce friction between the articul ...
in the body. They are lined with a
synovial membrane
The synovial membrane (also known as the synovial stratum, synovium or stratum synoviale) is a specialized connective tissue that lines the inner surface of capsules of synovial joints and tendon sheath. It makes direct contact with the fibrous ...
that secretes a lubricating synovial fluid.
There are more than 150 bursae in the human body.
The bursae rest at the points where internal functionaries, such as
muscle
Skeletal muscles (commonly referred to as muscles) are organs of the vertebrate muscular system and typically are attached by tendons to bones of a skeleton. The muscle cells of skeletal muscles are much longer than in the other types of mus ...
s and
tendon
A tendon or sinew is a tough, high-tensile-strength band of dense fibrous connective tissue that connects muscle to bone. It is able to transmit the mechanical forces of muscle contraction to the skeletal system without sacrificing its ability ...
s, slide across
bone
A bone is a rigid organ that constitutes part of the skeleton in most vertebrate animals. Bones protect the various other organs of the body, produce red and white blood cells, store minerals, provide structure and support for the body, ...
. Healthy bursae create a smooth, almost frictionless functional gliding surface making normal movement painless. When bursitis occurs, however, movement relying on the inflamed bursa becomes difficult and painful. Moreover, movement of tendons and muscles over the inflamed bursa aggravates its inflammation, perpetuating the problem. Muscle can also be stiffened.
Signs and symptoms
Bursitis commonly affects superficial bursae. These include the
subacromial,
prepatellar,
retrocalcaneal, and
''pes anserinus'' bursae of the shoulder, knee, heel and shin, etc. (see
below
Below may refer to:
*Earth
* Ground (disambiguation)
*Soil
*Floor
* Bottom (disambiguation)
*Less than
*Temperatures below freezing
*Hell or underworld
People with the surname
*Ernst von Below (1863–1955), German World War I general
*Fred Below ...
).
Symptoms vary from localized warmth and
erythema to joint pain and stiffness, to stinging pain that surrounds the joint around the inflamed bursa. In this condition, the pain usually is worse during and after activity, and then the bursa and the surrounding joint becomes stiff the next morning.
Bursitis could possibly also cause a snapping, grinding or popping sound – known as
snapping scapula syndrome – when it occurs in the shoulder joint. This is not necessarily painful.
Cause
There can be several concurrent causes. Trauma,
auto-immune
In immunology, autoimmunity is the system of immune responses of an organism against its own healthy cells, tissues and other normal body constituents. Any disease resulting from this type of immune response is termed an "autoimmune disease". P ...
disorders,
infection
An infection is the invasion of tissues by pathogens, their multiplication, and the reaction of host tissues to the infectious agent and the toxins they produce. An infectious disease, also known as a transmissible disease or communicable di ...
and
iatrogenic (medicine-related) factors can all cause bursitis.
Bursitis is commonly caused by
repetitive movement and excessive pressure. Shoulders, elbows and knees are the most commonly affected. Inflammation of the bursae may also be caused by other inflammatory conditions such as
rheumatoid arthritis
Rheumatoid arthritis (RA) is a long-term autoimmune disorder that primarily affects joints. It typically results in warm, swollen, and painful joints. Pain and stiffness often worsen following rest. Most commonly, the wrist and hands are inv ...
,
scleroderma,
systemic lupus erythematosus
Lupus, technically known as systemic lupus erythematosus (SLE), is an autoimmune disease in which the body's immune system mistakenly attacks healthy tissue in many parts of the body. Symptoms vary among people and may be mild to severe. Commo ...
, and
gout
Gout ( ) is a form of inflammatory arthritis characterized by recurrent attacks of a red, tender, hot and swollen joint, caused by deposition of monosodium urate monohydrate crystals. Pain typically comes on rapidly, reaching maximal intens ...
.
Immune deficiencies, including
HIV and
diabetes
Diabetes, also known as diabetes mellitus, is a group of metabolic disorders characterized by a high blood sugar level ( hyperglycemia) over a prolonged period of time. Symptoms often include frequent urination, increased thirst and increased ...
, can also cause bursitis.
Infrequently,
scoliosis
Scoliosis is a condition in which a person's spine has a sideways curve. The curve is usually "S"- or "C"-shaped over three dimensions. In some, the degree of curve is stable, while in others, it increases over time. Mild scoliosis does not ty ...
can cause bursitis of the shoulders; however, shoulder bursitis is more commonly caused by overuse of the shoulder joint and related muscles.
Traumatic injury is another cause of bursitis. The inflammation irritates because the bursa no longer fits in the original small area between the bone and the functionary muscle or tendon. When the bone increases pressure upon the bursa, bursitis results. Sometimes the cause is unknown. It can also be associated with various other
chronic systemic diseases.
Diagnosis
Types
The most common examples of this condition:
*
Prepatellar bursitis, "housemaid's knee"
*
Infrapatellar bursitis, "clergyman's knee"
*
Trochanteric bursitis, giving pain over
lateral aspect of hip
*
Olecranon bursitis, "student's elbow", characterised by pain and swelling in the elbow
*
Subacromial bursitis, giving shoulder pain, is the most common form of bursitis.
*
Achilles bursitis
*
Retrocalcaneal bursitis
*
Ischial bursitis
Ischial bursitis (also known as weaver's bottom) is inflammation of the synovial bursa located between gluteus maximus muscle and ischial tuberosity.
Signs and symptoms
Ischial bursitis causes pain down the posterior aspect of the upper th ...
, "weaver's bottom"
*
Iliopsoas bursitis
*
Anserine bursitis
Treatment
It is important to differentiate between infected and non-infected bursitis. People may have surrounding cellulitis and systemic symptoms include a fever. The bursa should be aspirated to rule out an infectious process.
Bursae that are not infected can be treated symptomatically with rest, ice, elevation,
physiotherapy
Physical therapy (PT), also known as physiotherapy, is one of the allied health professions. It is provided by physical therapists who promote, maintain, or restore health through physical examination, diagnosis, management, prognosis, patie ...
,
anti-inflammatory drug
Anti-inflammatory is the property of a substance or treatment that reduces inflammation or swelling. Anti-inflammatory drugs, also called anti-inflammatories, make up about half of analgesics. These drugs remedy pain by reducing inflammation as op ...
s and pain medication. Since bursitis is caused by increased friction from the adjacent structures, a compression bandage is not suggested because compression would create more friction around the joint. Chronic bursitis can be amenable to
bursectomy and aspiration.
Bursae that are
infected require further investigation and
antibiotic
An antibiotic is a type of antimicrobial substance active against bacteria. It is the most important type of antibacterial agent for fighting bacterial infections, and antibiotic medications are widely used in the treatment and prevention ...
therapy. Steroid therapy may also be considered.
In cases when all conservative treatment fails, surgical therapy may be necessary. In a bursectomy the bursa is cut out either
endoscopically or with open surgery. The bursa grows back in place after a couple of weeks but without any inflammatory component.
See also
*
Calcific bursitis
*
Snapping scapula syndrome
References
External links
Bursitis treatmentfrom
NHS Direct
Questions and Answers about Bursitis and Tendinitisnbsp;– US National Institute of Arthritis and Musculoskeletal and Skin Diseases
{{Soft tissue disorders
Synovial bursae
Inflammations
Soft tissue disorders