Why does the outside of my knee hurt when I squat or bend it fully?

What deep bending does to the outer knee

As the knee bends past about 120 degrees, the thigh bone rolls back on the shin bone and compresses the rear horn of the meniscus. If that part is torn or degenerate, deep flexion produces a sharp or pinching pain at the outer back corner of the knee, and getting up from the floor can catch.

The same movements are a daily routine for many people in Qatar: sitting on the floor at majlis gatherings, kneeling and sujood in prayer, squatting with children or at work. In a younger patient a tear may follow a single deep squat with a twist. After middle age, a degenerative tear or early arthritis in the outer compartment is more likely, and it may come with mild swelling after a busy day.

Practical changes for now

• Avoid deep squats and long periods sitting on the floor while it settles
• For prayer, many patients use a chair or low stool temporarily while sujood is painful, and can discuss the ruling with a scholar
• In the gym, squat only to a depth that stays comfortable, and replace deep squats with leg press or box squats
• Strengthen the thigh and hip muscles to share the load
• Ice after activity can calm any swelling

When it needs attention

See a knee specialist if the knee locks or catches when you rise, swells repeatedly, gives way, or if the pain is still there after four to six weeks of avoiding deep bending. A knee that suddenly cannot straighten after a squat should be seen quickly.

Assessment at Aman Hospital in Doha

Dr. Gelber looks at where the pain sits, how far the knee bends, and runs meniscus tests in deep flexion. Depending on age and findings, a standing X-ray, an MRI or both may be helpful. Many patients improve with a structured physiotherapy programme. When a tear causes mechanical symptoms, arthroscopic repair or trimming may be discussed, aiming to keep as much meniscus as possible.