If you are unsure of what your knee injury is then why not check out our symptom checker? Or select from the options below:
If you have suffered an acute or sudden onset knee injury then immediate first aid should be applied. Read our guidlines on when you should see a doctor.
Acute knee injuries
An acute knee injury usually occurs suddenly through either trauma or a twisting action. Pain in the knee can vary in severity from very mild to very severe and this depends on the injury mechanism (how the injury occurred) and the forces involved during the impact. It is strongly advised not to carry on playing if you have acute knee pain as this can easily progress to a chronic pain or to more complex knee injuries.
ACL Injury (anterior cruciate ligament sprain) or 'ACL injuries' are common in contact sports and especially those that are combined with sudden change of direction such as soccer or football. Often it will not occur in isolation but in most cases occur with damage to other structures within the knee such as the cartilage or ligaments.
Medial meniscus tear or torn meniscus is a tear to the semi circular shock absorbing cartilage in the knee joint causing pain on the inside of the knee. It is commonly injured through direct impact to the outside of the knee in contact sports or twisting but can also occur in older athletes through degeneration.
Medial ligament sprain (MCL injury) is a tear of the ligament on the inside of the knee, usually a result of twisting or direct impact. Symptoms include pain and swelling on the inside of the knee, often along the joint line.
Lateral ligament sprain (LCL) is a knee ligament injury involving a tear to the ligament on the outside of the knee and is most likely following a direct blow to the inside of the knee or twisting.
Patella dislocation occurs when the kneecap dislocates outside of its normal position, usually round the outside of the knee. It can also partially dislocate, called a subluxation. Pain will be felt immediately at the time of injury. There is likely to be swelling in the knee joint and there will be an obvious displacement of the kneecap.
Knee contusion or bruised knee occurs due to a direct impact or trauma to the knee. This can be due to a fall directly onto the knee or something hitting the knee, such as a ball or club. Contusion is the medical term for a bruise. The area will be tender to touch and there may be some swelling. The bruising will change color and start to fade after a few days.
View all acute or sudden onset knee injuries >>>
Chronic Knee Injuries
Chronic knee injuries usually develop gradually demonstrated in a slow increase in knee pain and / or swelling. They often start out as seemingly minor injuries with mild pain and little or no swelling and therefore athletes often “play on” through them. If treated correctly by following the P.R.I.C.E principles in the acute stages the injury can be prevented from progressing to the very debilitating chronic condition (as is often seen in many professional athletes).
Original article and pictures take http://www.sportsinjuryclinic.net/sport-injuries/knee-pain site