Stiffness is a common symptom of knee arthritis and following knee injury.
After an acute, sporting type, injury the joint will typically feel stiff and tight for six weeks and then begin to loosen up as the swelling resolves. Gentle range of movement exercises, icing, compression bandaging and anti-inflammatory medications can help to settle this problem.
Stiffness within the knee is very common in arthritis. As the joint surface wears and the ligaments around the knee tighten the stiffness tends to worsen. Eventually the range of movement reduces as full extension and flexion are no longer possible. Gentle stretching exercises, and treatment from a physiotherapist, can often help to reduce this problem.