My late Dad, had Diabetes.
It, affects the ENTIRE body.... the circulatory system, the nervous system, the eyes, the vital organs, the kidneys, their genitals (because it is a circulatory system), their heart and blood pressure, they can get numbness in their foot and hands, etc.
My Dad, had had a stroke, failing eyesight then could NOT work NOR drive a car, he had had heart surgery, he then had Kidney Failure and had to be in Dialysis 3 times a week for HOURS, all day.
Tell your Husband, my Dad DIED, because of Diabetes.
Nagging your Husband will not help.
He needs to also be going to the Doctor.... having his heart and kidneys monitored too. He should have a Primary Care Physician, an Eye Specialist, a Renal Doctor (kidney doctor) and heart Doctor.
He also needs to see a Nutritionist.
My Dad, saw ALL of these Specialists, regularly.
Also, if his foot gets infected, he can get GANGRENE and lose his foot. T his is common in Diabetics. Because... their circulation and immune system, is weak.
A Diabetic, even has to learn how to cut their own toenails... BECAUSE if they get cut on their foot, it can lead to infection and worse. AND some Diabetics cannot even "feel" if they are cut, because their feet gets numb.
Sorry to be so blunt.
But Diabetes is very serious.
He NEEDS to go to the DOCTOR... to check his feet!
He is Diabetic.
This is something that has to be done.
CHECK his feet per his injuries.