Whether it's my knees or my back, it seems like going to the hospital only provides temporary relief.

I'm the same way, but my parents are getting old, so there isn't a single part of their body that doesn't ache.
He goes to the hospital frequently, especially because his back and knees are in bad shape.
Whether I receive physical therapy or get injections, it always seems to only last for that specific day.
It feels okay for a short while, but as time passes, the pain seems to gradually return.
Even if I go to a big hospital, there isn't really an answer, perhaps because it is a disease caused by old age.
I feel like I can somewhat understand why elderly people do not go to larger hospitals even though they receive physical therapy every day.