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Knee and Leg Pain

Knee Ligament Injuries Posterolateral Corner Injury Superior Tibiofibular Joint Sprain
ACL Injury PCL Injury MCL Sprain
LCL Sprain Restless Legs Syndrome
Meniscus Tear Discoid Meniscus Chondromalacia Patella
Fat Pad Syndrome Patella Dislocation Patellofemoral Pain Syndrome
Osgood Schlatter’s disease Sinding Larsen Johansson Syndrome Knee Osteoarthritis
Rheumatoid Arthritis Patellar Tendonitis (Tendinopathy) Pes Anserinus Tendinitis
Poplitial Tendonitis Thigh Strain Hamstring Strain
IT Band Friction Syndrome Popliteus syndrome Muscle Cramps
DOMS – Delayed Onset of Muscle Soreness Quadriceps contusion injury Bursitis around Knee
Pes Anserinus Bursitis Runner’s Knee Plica Syndrome
Fibromyalgia Stress Fracture Overuse Injuries


The knee is a hinge-joint formed between the tibia (lower bone) and femur (upper bone), also called Tibiofemoral joint, which is dived into medial and lateral compartment. The patella glides over the front of femoral condyles to form a patellofemoral joint. In addition, there is superior tibiofibular joint between the tibia and the head of fibula (outer leg bone).

The knee joint is particularly susceptible to traumatic injury because it depends more on the ligaments due to less musculature around it for its strength and stability. The space between the tibia and femur is partially filled by two menisci (inner and outer sides) that are attached to add congruency. They aid in lubrication and nutrition of the joint and act as shock absorbers.


The functions of different ligaments of the knee are:

Medial Collateral (inner side ligament) Prevents medial (inner side) opening up
Lateral Collateral (outer side ligament) Prevents lateral (outer side) opening up
Anterior Cruciate (within joint on the front side) Prevents anterior (front) translation of the tibia on the femur
Posterior Cruciate (within joint on the back side) Prevents posterior (back) translation of the tibia on the femur.

NOTE: It must also be remembered that the lumbar spine (lower back), hip, and ankle may refer pain to the knee, and these joints must be assessed if it appears that joints other than the knee may be involved.


Chondromalacia patella: Irritation of the cartilage on the underside of the kneecap (patella), causing knee pain. This is a common cause of knee pain in young people.

Knee osteoarthritis: Osteoarthritis is the most common form of arthritis, and often affects the knees. Caused by aging and wear and tear of cartilage, osteoarthritis symptoms may include knee pain, stiffness, and swelling.

Knee effusion: Fluid buildup inside the knee, usually from inflammation. Any form of arthritis or injury may cause a knee effusion.

Meniscal tear: Damage to a meniscus, the cartilage that cushions the knee, often occurs with twisting the knee. Large tears may cause the knee to lock.

ACL (Anterior Cruciate Ligament) strain or tear: The ACL is responsible for a large part of the knee’s stability. An ACL tear often leads to the knee “giving out,” and may require surgical repair.

PCL (Posterior Cruciate Ligament) strain or tear: PCL tears can cause pain, swelling, and knee instability. These injuries are less common than ACL tears, and physiotherapy (rather than surgery) is usually the best option.

MCL (Medial Collateral Ligament) strain or tear: This injury may cause pain and possible instability to the inner side of the knee.

Patellar subluxation/ Dislocation: The kneecap slides abnormally or dislocates along the thigh bone during activity as a result patient complains of Knee pain and inability to walk.

Patellar tendonitis: Inflammation of the tendon connecting the kneecap (patella) to the shin bone. This occurs mostly in athletes from repeated jumping.


1. Sharp catching pain Mechanical defect (trauma)
2. Aching type pain with morning stiffness which eases with movements but gets worst with exertion Degenerative changes
3. Night pain Degenerative changes, lateral cystic cartilage, Meniscal tear
4. Pain on weight bearing Mechanical or arthritic lesion
5. Pain while climbing up or down the steps or rising from chair Patellofemoral origin
6. Pain on twisting Meniscal origin
7. Pain over bony eminence below knee in young adults Osgood Schlatter’s disease


Common Causes of knee pain includes:

1/ Knee Ligament Injuries

2/ Meniscus injury

3/ kneecap (patellar) Pain

4/ Knee Arthritis

5/ Knee Tendonitis

6/ Muscle Injuries


7/ Knee Bursitis

8/Other Knee-Related Conditions

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