I tried to have our expert Dr. Fran Cogan answer this, but she is overseas, so she sent her answer for you and asked me to post:
Not all foot pain is related to diabetes. You did not mention the age of your child. It is possible that he is having cramps related to exercise during the day. If the location of the pain is in the front of his shins, this may be classical growing pains. As always, checking blood sugars are a good idea to ensure he is neither high nor low. It is always a good idea to check in with your pediatrician to rule out any other possibilities which as juvenile rheumatoid arthritis.
We hope you find this general health information helpful. Please note however, that this Q&A is meant to support not replace the professional medical advice you receive from your doctor. No information in the Answers above is intended to diagnose or treat any condition. The views expressed in the Answers above belong to the individuals who posted them and do not necessarily reflect the views of Remedy Health Media. Remedy Health Media does not review or edit content posted by our community members, but reserves the right to remove any material it deems inappropriate.