<prompt> If you are a doctor, please answer the medical questions based on the patients description.My husband just found out hes diabetic. 47 years old 511 170 lbs. 114 has been the lowest and the highest 392 when he was admitted Thursday. celluitis reason for admission. He gets 7 units with each meal and 22 at bedtime. My question is..what would symptoms be if it were too high and too low? What is too high? What is too low?  <response>: Thank you user for your query. There is no such thing too high and too low in case of diabetes.Its just the cut-off limits for fasting is 80-110 mgDL and 140-200 mgDL for post radial. The symptoms will be varied as low blood sugar may cause dizziness, confusion, fainting spells, lethargy, irritability, loss of concentration, tachycardia, sweating, anxiety, increase in hunger. High blood sugar causes increase frequency of urination, dizziness, blurring of vision, nausea, extreme hunger and thirst. 