The pain in the back of the foot may be caused by diabetes, but it may also be caused by local impact and other factors, which need to be examined by a professional doctor to clarify the condition. 1. Diabetes: If a diabetic patient has diabetic peripheral neuropathy, he may have hypersensitivity to pain in both feet, which may be manifested as dorsal pain, numbness and other conditions. 2. Impact: When the dorsum of the foot of a diabetic patient is hit by an external force, dorsal pain may occur, and may also be accompanied by bruising, redness and swelling. There are many reasons for dorsal pain, not all of which are caused by the above factors, and it is not possible to diagnose a disease solely by its symptoms. Before treatment, patients need to go to the hospital for relevant examinations to deal with the cause of the disease.