Swelling under the knee: symptoms, diagnosis

Delivering noticeable discomfort swelling in the knee area can be triggered by a trauma or exacerbation of the inflammatory joint disease - arthritis, which, in turn, can be infectious or allergic in nature.

An aggravating factor in this condition is hypothermia.

If the swelling in the knee all the same arose, then it is necessary to perform primary medical actions to alleviate the manifested symptoms. For this, doctors recommend that a tight bandage be applied to the affected area, in order to limit its mobility. In addition, it does not hurt if the swelling is accompanied by painful sensations, apply an analgesic drug, to which the patient has no allergy.


If the swelling in the knee is caused by trauma, it is easy to determine, since the memory of this event has not yet had time to disappear from the head. If injuries in the foreseeable past are not available, then the edema is already a mystery, for the resolution of which it is necessary to undergo a medical examination. Usually, in such situations, the doctor gives a direction for fluoroscopic research, which, however, does not do with soft tissue injuries. In addition, the internal state of the joint will be examined with the help of arthroscopy, it is desirable to perform electrangiopathy, tomography (MRI), to perform a blood test. Probably, it is necessary to carry out also a puncture of a joint.

Although puncture of the joint is a rather painful procedure, it quite accurately makes it possible to distinguish between allergic and infectious arthritis. Now, as determined, the doctor can prescribe an adequate treatment.

Symptoms of knee swelling

When the knee swelling is located just behind, doctors can suspect Becker's cyst under the knee. In some cases, this disease is asymptomatic, however, in most cases, the patient begins swelling in the back of the knee, which sometimes tends to spread across all legs. In addition, the mobility of the knee decreases, knee pain arises in the knee joint, a cyst resembling a balloon filled with water is felt, numbness and tingling in the feet are felt, and when the veins are blocked, pain occurs in the calf muscles.

If at least one of these symptoms occurs, you should see a doctor.

The growing cyst is a danger by squeezing the nerve endings and blood vessels. This is the reason for the subsequent severe pain in the legs, and the violation of blood flow in the veins leads to development of the blood clots in the lower leg. In turn, it is fraught with varicose veins and thrombophlebitis, and the cyst rupture leads to inflammation of the entire shin.

If Becker cyst under the knee, does not show up in pains and unpleasant sensations, has arisen recently, usually no intervention is required and this education may well go by itself. You can, of course, take a puncture, at which the doctor pierces and pumps out the liquid. Then anti-inflammatory steroid preparations are injected into the cavity. If the cyst is caused precisely by inflammatory phenomena, it is the cause of the inflammation that should be treated. If the Becker cyst under the knee does not cure itself and is present for a long time, the doctors prescribe an operative intervention, which consists in removing the tendon mucous bags.