Hi, thanks for writing to HCM.
After going through your elaborate description, the cause for your pain could be
* INFECTION - Persisting pain after an implant surgery in a fractured bone should always raise the possibility of infection. There may not be any external signs and symptoms of infection in most cases. A detailed evaluation and workup is necessary to rule out infection.
* METAL ALLERGY
- this is a remote possibility but should be considered in your case as you are allergic to nickel. Pain around the site of implanted metal is the constant presentation. The only way to deal with it is by implant removal.
Hope this information is helpful. Good day