Painful lumps that last more than 3 weeks are not necessarily normal, even though some swollen lymph nodes can be swollen normally for a month or more. It's worth getting rechecked with a different doctor if you're not satisfied with this 1st doctor's explanation that it's a bony prominence. I can't suggest anything other than seeing another doctor. Who else is going to be able to examine it and tell you what they think?
Dr. Enoch Choi, MD
Palo Alto, CA