Replying to Permanent shinbang? (super sensitive shins)

ok so i my last day skiing was probly mid april or may, and have been fighting bad fitting boots all season. i had massive shinbang all season and was just miserable. i eventually had to ski with none of the top buckles buttoned up. (the boots were atomic hawx 90 btw) so after 5 months off ( today which is october 5th) i decide to try on my boots and flex them. about half way through the full flex of the boot my shins start to hurt in the same spot on both legs. is this due to the improper fitting boot? or do i just have a case of permanent shinbang (or super sensitive shins) . the main reason for the boot fitting wrong is because its a 28.5 and i should be in a 27.5.