The person that is diagnosed with diabetes and could experience a diabetic coma could have symptoms before they would slip into a coma. The diabetic coma does not just happen, there are symptoms that can occur if the blood sugar level is too high or too low.
The diabetic with high blood sugar could experience certain symptoms prior to going into a coma:

• The diabetic could experience increased thirst
• They could experience frequent urination
• The diabetic could experience a dry mouth
• Nausea could be experienced
• Vomiting could be experienced
• Shortness of breath is commonly experienced