A WebMD Community member says that she had very successful knee surgery and was back to work in eight weeks. Therapy went well and her range of motion is good. She no longer has sciatica pain, and she's able to hike and walk again. But the one thing that bothers her is the crunching noise that her knee makes -- especially when she goes up and down stairs. She said that her doctor said it's nothing to worry about, but she asks other members of the community if they've had similar experiences.
Several members weighed in with their crunching stories. One member said that her physical therapist blamed the noise on tissues that were sticking during the healing process. Her crunching eventually went away. Another member said she was told it was the prosthesis rubbing against the knee bone.
In all cases, no one said they had any pain with the crunching noise. It's just an odd symptom that sometimes comes after surgery. One member says she ignores it by putting her fingers in her ears when she goes upstairs!
As always, talk to your doctor if you have any worries after surgery.