My son is 25 yrs old. He is an alcoholic but hasn t drank in 4 months. We found out after several stays in the hospital that he has type 1 diabetes and is now insulin dependant. He goes though spells where he wake in the early hours of the morning with severe pain in the left side middle of his back. The pain is so bad that he screams. The doctors here have done xrays of his back and a cat scaan and they can t find anything. What could cause this to accur every night at the same time, usually lasting 3 or 4 hours.