Achiness all over in Gastric Bypass Surgery Forums Posted September 21, 2015 It might be your body adjusting to being smaller. My muscles have to adjust to my bones. I had a lot of pain, but my surgeon referred me to physical therapist. I do the physical therapy in a heated pool, which is really great.that's good to know. My doc referred me to physical therapy too. Didn't think it would help but I will try since you are getting results.