When should you worry about limping with knee osteoarthritis?

Knee osteoarthritis can make the joint stiff or sore, so you may shorten your stride, avoid weight on one side, or walk differently after sitting. A limp that gradually settles with gentle movement may reflect a flare. A sudden change can also signal an injury, marked swelling, infection, or another problem affecting the hip, leg, or foot. The limp itself does not identify its cause.

Reduce activities that clearly increase pain, but keep the knee moving within a comfortable range. Use a stable walking aid only if a clinician has shown you the correct height and technique. Note when the limp began, whether swelling or locking is present, and whether pain occurs at rest or at night. Arrange a routine review if the change continues or limits ordinary walking.

Seek urgent medical advice for inability to bear weight, a hot red swollen knee with fever, severe pain after a fall, a visibly deformed joint, or a foot that becomes pale, blue, cold, or numb. Prompt assessment is also sensible when the knee repeatedly gives way, locks, or the limp is rapidly worsening.

Ask whether the limp fits your current knee findings, whether another joint should be examined, and which exercises or walking aid are appropriate. You can also ask what change should trigger an earlier review and how to manage pain while staying active.