The back of my knee feels tight when I kneel or sit on the floor. Could it be a Baker's cyst?

Why deep bending is the problem

Full bending brings the calf and the back of the thigh together. If a fluid-filled cyst sits between them, it gets compressed, which creates a feeling of fullness, pressure or a block before the knee bends all the way. People often notice it most when sitting back on their heels, sitting on the floor at family gatherings or majlis, or squatting.

Pain from the back part of the meniscus, which is also squeezed in deep bending, can feel almost identical, and the two often occur together.

Other causes of tightness behind the knee

• A tear in the back part of the inner meniscus, often with joint-line pain
• Knee osteoarthritis, with stiffness and reduced bending
• Tight hamstring or calf muscles, felt as a pulling sensation rather than a lump
• Swelling inside the whole joint after an injury or flare

Adapting daily life while it settles

• Sit on a low cushion or stool instead of directly on the floor
• Avoid sitting on your heels for long; stretch the leg forward between positions
• Use a thick prayer mat and lower yourself slowly
• Gentle cycling and straight-leg exercises keep the knee moving without deep bending

Some patients choose to pray seated on a chair for a period while the knee settles. Patients can discuss the religious ruling with a scholar; medically, it simply reduces pressure behind the knee while the cause is treated.

When to see a knee surgeon

Book an assessment if the tightness lasts more than a few weeks, there is a visible lump, the knee swells, or you are losing bending. Seek urgent care for sudden calf swelling and pain. At Aman Hospital in Doha, Dr. Gelber examines the back of the knee and the meniscus, and an ultrasound or MRI distinguishes a cyst from a tear or both. Treating the cause is usually what restores comfortable deep bending.