Sometimes your pain is referred pain – you feel pain in an area that is really hurting elsewhere. This seems common with teeth – you might feel pain in an upper tooth, but the issue is really in your lower tooth, like a cavity or infected root. The pain in the non-affected tooth is not valid pain.
Sometimes you have had pain in an area for years, and even though you had surgery to correct the issue (like lower back pain and then got lumbar surgery), but the pain lingers or is worse and in the same area, even after the healing is complete.
You need to train your brain to feel the correct pain in the area it is in or train your brain not to feel the pain.
You can think hard “I do not feel the pain” in the area of surgery that should be healed. Do this every day and every time you think about the pain.
You can go to acupuncture and get treated to not feel the pain anymore – then continue to train your brain. You can get massage, go to physical therapy, see a chiropractor, etc. to get some relief and strengthen and align the area. If you are looking good overall, just realize your pain may not be valid and train your brain not to feel it.
Not all instances are invalid – some surgeries did not work, or later on failed, or there is too much damage to an area. Figure out if yours is a real or perceived pain issue.
If you realize your pain may not be correct, or not be taken care of after treatment, your brain may need to be trained to not accept the feeling of pain.