Based on the symptoms described, the exact cause cannot be confirmed without a physical examination. Tightness and difficulty bending the knee/leg may arise from a muscle or tendon problem, knee joint inflammation, nerve irritation, or swelling around the thigh/knee.
However, because she has
diabetes and describes significant pressure/tightness in one leg, it is important to rule out a vascular problem such as deep-vein thrombosis (DVT), particularly if there is swelling, warmth, redness or calf/thigh tenderness. Physiotherapy should not be started aggressively until this has been excluded.
Next Steps
She should be reviewed again by an orthopaedic doctor for examination of the hip, thigh, knee and neurological status. If there is unilateral swelling or clinical suspicion of DVT, a venous Doppler ultrasound may be required urgently.
Once serious vascular or acute medical causes have been ruled out and a musculoskeletal diagnosis is established, physiotherapy can certainly help. Treatment may include pain-relieving measures followed by gentle range-of-motion exercises, appropriate stretching and progressive strengthening, depending on the findings.
Health Tips
For now, avoid forceful knee bending, vigorous exercises or deep massage of the painful/swollen leg until DVT or another vascular problem has been excluded.
Seek urgent medical attention if she develops rapidly increasing swelling, redness/warmth, severe calf or thigh pain, chest pain, sudden breathlessness, dizziness or coughing up blood.
Diabetes also makes timely assessment particularly important.