Diabetics can be at risk from the effects of both the condition and the methods of controlling it. The possibility of seizures and loss of consciousness from hypoglycemia has been the big obstacle to certifying diabetics. Insulin reactions and the resulting rapid onset of low blood sugar levels can impair judgment. Sorry, the risks are still too great. The Guidelines Before Diving Wear a medical ID stating that you are diabetic and also a diver.
Hydration is doubly important to the diabetic diver to prevent decompression illness.
Maintain good physical condition and good diving skills. Tell the divemaster. He or she must be aware that you're a diabetic and should also be informed of your intended profile. Tell your buddy. The diabetic diver's buddy should be familiar with the diabetic, aware of potential problems and properly trained in responding to them.