Backgrounds: diabetes mellitus is one of the most dangerous disease in human .so it's important to complaint the therapeutic plan of diabetes mellitus continuously which can reduce the complications and mortality of this disease. Aims of the Study: The aims of study is to identify the association between diabetes mellitus with complications and complaints. Methodology: A cross sectional study done to patients with diabetes mellitus from 1st February 2023 to 10th April 2023. A convenient sample of 245 patients with diabetes mellitus. Results: male and female equal percentile. The most of the sample is blood group (O) 43.3% and followed by blood group (A) is 24.9%. 22.9 % were smokers and the major of the sample were had family history of DM either by their parents or brother and sisters. Regarding the complication of the Dm we found the eye complication were 15.9%, cardiovascular complications were 8.9%, neuropathy were 16.3%, teeth complications were 10.6%, diabetic foot were 6.5%, dermatological complications were 4.1%, GIT complications were 7.8%, genital complications were 4.9%, nephropathy 11.4%, recurrent infection were 11.8% and other 5.7%. Regarding the problems of the DM thyroid were 5.7%, adrenaline were 0.8%, asthma were 6.5%. Allergy were 14,7 and autoimmune disease were 9.4%. 39.6% were go to the emergency room or lie in the hospital because of diabetes. 73.9 % were complain to treatment, 4.9 % were not complain and 21.2% were often not complain. 33.5% were complain to diet, 26.9 % were not complain and 39.6% were often not complain. 62.1% were complain to measure his sugar regularly, 10.2 % were not complain and 27.7% were often not complain. 57.5% were use pills, 28.9% were use insulin and 2.1% were use both (insulin and pills), 7.8% were use pills and now insulin and 3.7 % were only diet. Conclusions: We conclude that were association between DM and complications (eye complication, cardiovascular complications, neuropathy, teeth complications, diabetic foot, dermatological complications, GIT complications, genital complications, nephropathy, recurrent infection) and there were association between problems of the DM (thyroid, adrenaline, asthma, allergy, autoimmune disease). There were significant association between DM and complaint to medication, complaints to diet and using insulin and pills.