Arthralgia of the knee joint
Joint pain without a specific cause is called arthralgia. Arthralgia of the knee joint has no accompanying symptoms, such as swelling, pain, difficulty in movement of the limb. When x-ray studies, no changes in the structure of the joint not observed. The exact causes of arthralgia is unknown. There are suggestions that arthralgia is the harbinger of the beginning of the development of joint diseases or as evidence of failures in the immune system.
The structure of the knee joint
To understand the causes of joint pain, you need to have an idea about how is the knee joint. The knee is a complex mechanism with your biomechanics. As you know, the more complex the mechanism, the more often it breaks. Therefore, diseases and injuries of the knee are not uncommon in medical practice.
The knee joint to form 2 bones: the femur and the tibia. In front of this joint is covered by a small round bone patella. The ends of these bones are covered with cartilage tissue, which facilitates sliding of the bones relative to each other and prevents the Erasure of the bone tissue. On the tibia there are two small cartilage pads called menisci. They are necessary to mitigate the impact when driving and reduce the load on the entire musculoskeletal system of man.
Between the femur and the tibia are connected by ligaments. One pair of ligaments located on the sides of the limb and is called the collateral ligament. The other is a ligament located directly between the bones. This entire structure is covered by the articular bag. Tight bag seals the joint, protecting it from possible damage. In addition, the formed glenoid cavity completely filled with synovial fluid that produces inner membrane bags. This fluid is necessary for lubrication of the joint, as well as to supply to cartilage.
As you know, bone and cartilage tissue does not contain nerve endings. All the nerve endings are located in the articular capsule, the violation of which lead to pain.
The closer the fabric is to the articular capsule, the more pronounced will be the sensitivity. If, for example, the meniscus tear torn part of it gets between moving surfaces, and «pulls» the whole meniscus that causes pain. You can compare this with pulling by the hair, which hurt not the hair and the scalp.
Causes and symptoms arthralgia
Arthralgia occurs when there is irritation of neuroreceptors in the joint capsule. The causes of this kind of pain can be many. In addition to violations of the immune system as the main factor in the development of arthralgia, there are the following causes of disease:
- of injury small cracks and gaps are striking elements of the knee joint, which subsequently can lead to the development of joint diseases;
- physically excessive load;
- the extra pounds;
- circulatory disorders in the lower extremities due to diseases (e.g., varicose veins), or due to a sedentary lifestyle;
- joint diseases (reactive arthritis, osteoarthritis, gout);
- weather conditions – wet and damp weather can affect the nerves, because of this, the buds break out and can cause pain;
- infectious and viral diseases, ache, aching joints may occur when, for example, influenza, SARS, etc.;
- allergic reactions.
Symptoms can be varied. The beginning of the attack begins with a weak and aching or throbbing pain, which may be replaced by a growing and very intense pain. There is aching pain in the muscles. Arthralgia can affect not only the knees but any other joint in the human body.
The number of affected joints arthralgia distinguish between these types of disease.
Varieties of ailment
|Monoarray.||The pain is felt only in one joint.|
|Oligodactylia.||Pain affects up to five joints.|
|Polyarthralgia.||The affected group of five joints.|
Depending on the nature of pain, and the source of an outbreak, there are several types of arthralgia. Infectious and reactive arthralgia occur in cases where the human body is a chronic focus of infection. Such chronic diseases include tuberculosis, pyelonephritis, syphilis, brucellosis, etc. May be accompanied by chills, fever, General weakness and muscle pain. Arthralgia may be post-infectious and occur a few weeks after, for example, intestinal infections or infections of the urinary tract.
About arthralgia appears when the pinched nerve, as well as damage of muscles, ligaments and tendons.
As the disease in children
Knee pain can disturb not only adults but also children. Often arthralgia occurs in children of primary school age. The child can «spin» your knees, children complain of aching and dull pain. The pain usually manifests itself at night. In children this is due to a period of intense growth, when bones are growing too fast and the muscles and blood vessels behind.
In addition, the cause of pain in the legs can also be increased activity in children. Bone tissue is still weak and the number of movements per day the child much more than adults. Because of this, his feet carry a heavy load, and the fatigue is manifested by pain in the legs.
Painful sensations can also arise as a result of diseases (angina, tonsillitis). In contact with the bacteria that cause these diseases, the body begins a fight with them and produces antibodies. But, for example, streptococcal infection contains such elements that are similar to the antigens in heart, joints and adrenal glands. Therefore, together with harmful bacteria can hurt the heart, joints and other organs. Malignant tumors, osteomyelitis can cause joint pain.
Mention must also be made of the disease Osgood-Shlatter. This disease occurs in children from 13 to 16 years old, and suffering from the disease, mostly boys. This is due to their greater mobility: significant constant exercise can cause damage to the tendons of the knee joint. Accelerated growth in combination with repetitive loads may cause an avulsion fracture of the tibia, that is, from the bone off the tendon along with a portion of the bone to which it is attached. The disease may have symptoms such as lump formation immediately below the knee, swelling and pain. The site of the lesion do not change color, the temperature rise is not observed.
In some cases, the damage to the knee joint may and does not manifest itself, and found out by accident.