There are four main ligaments in the knee that can become injured. During injury, a knee ligament may be stretched or sometimes torn. Knee ligament injuries can cause pain, swelling, and tenderness, bruising and reduced movement of your knee. Your knee joint may feel unstable and you may walk with a limp. If you feel that you may have a knee ligament injury, you should see a doctor and an X-ray of your knee may be suggested. If you have a lot of swelling of your knee after your injury, doctors may sometimes suggest draining off some of the fluid that is causing the swelling in your knee. For the first 48-72 hours think of PRICE - Protect, Rest, Ice, Compression, Elevation, and do no harm - no heat, alcohol, running or massage. If the self-treatment doesn't work, them medications like paracetamol can ease pain. Drugs like non-steroidal anti-inflammatory drugs (NSAIDs) can relieve pain and may also limit inflammation and swelling. Physiotherapy may also help in improving the range of movement in your injured knee. Exercises may also be suggested to help strengthen the muscles that support your knee joint. Depending on the knee ligament injury that you have, your doctor may advise you to wear a special brace to support your knee while the damaged ligament heals. Surgery is most commonly suggested to repair ACL injuries. It usually takes around six months before your knee has recovered enough for you to return to your previous sporting activities.