This study focused its objective on knowing the extent of complications that exist and generated by the type of anaesthesia on the patient. A study was conducted of 800 patients collected from different Hospitals Baghdad, Iraq. Complications were found in 120 patients. All statistical analyzes were performed for patients of age, gender, and type of anesthesia used during in addition to that, the type of complications found in patients was identified, and by relying on the statistical analysis program SPSS Soft 20 and MSEXCEL, the data and demographic characteristics of the patients were analyzed.