If the joints are healthy, they do just fine with any reasonable load. In the presence of pathological process, the pressure acting on the joint surfaces, causing pain. The pain in the knee joint may indicate a number of diseases:
• bursitis;
• pathology of cartilage;
• rheumatoid arthritis in the early stages;
• inflammation of the knee tendons;
• a meniscus tear.

In addition to the pain, the following symptoms:
• swelling in the joint;
• redness of the skin;
• the deterioration of joint mobility;
• increased temperature in the knee region;
• crunch when you walk on the stairs.

Not trying to put myself diagnosis based on news articles online. Lessons self can only damage your health, lead to disability, so the only right decision is to visit a doctor. In addition to visual inspection, if necessary, the doctor will prescribe x-rays or magnetic resonance imaging. After receiving the results of the research, the doctor will prescribe the correct treatment.

Treatments



Disease of the knee joints treated in two ways:
1. Conservative treatment. Appointed in the case of osteoarthritis, a partial tear of the meniscus. The patient should be to eliminate the load on the knee joints, stop the exercise. After some time, the doctor will prescribe exercises to strengthen the muscles of the thigh. If there are signs of osteoarthritis of the assigned analgesic and anti-inflammatory drugs, and medication to restore cartilage tissue.
2. Surgical treatment. Partially or completely remove the meniscus. If possible, sew it or are transplanted through two punctures. After surgery followed by a long period of rehabilitation.

Exercises to prevent knee pain



There are simple exercises that help to maintain the health of the knee joints and strengthen the muscles around them. If you have had an injury before you start training, you should consult a doctor.

1. Stand straight, feet shoulder width apart. Pull the knee toward your chest as possible. Stand up like 7-8 seconds, then aboutto do the same with the other leg. If coordination is suffering, it is permissible to hold on to the wall. Repeat 3 times for each leg.
2. Stand up straight, hands to his castle behind. Lift the leg bent at the knee, and then straighten it, drawing his fingers, then again to bend the leg. It should stand straight, not to hunch. Repeat 6-7 times.
3. Stand up straight, feet should be reduced. Bend the leg at the knee and opposite arm to pull the foot to the buttocks. To stay in this position for 7-8 seconds, then do the same with the other leg. Perform 3 sets for each leg.
4. Lie on your back with your legs bent 90 degrees, toes pulling. Straighten one leg, then bend it. Alternating legs, repeat the exercise 8 times.
5. Sit up, pull stops, press down the knees and try to tear the heel from the floor. To sit in this position for no more than 25 seconds, then relax. Repeat the exercise 2-3 times.
6. Standing to connect the knees and a little sit down keeping your back straight. Hands should be above the knees. Perform a circular motion in one and in the other direction. Repeat 7-8 times.

Do not try to do all the exercises at once. You can choose the ones that you are able to do at the moment and not to overwork.