Alcohol use disorder is one of the biggest problems in India specially in Punjab.The effect ofalcohol on the brain is by affecting the brain reward system, in addition to affecting the concentrations of Dopamine, Glutamate, GABA and Glutamate neurotransmitters in the brain. The focus of this research is to know the effect of alcohol use disorder on the structural changes that occur in the brain by using the CT scan and relate its effectiveness on the behavior of the alcohol addicts. The AUDIT test was the test that determines the subjects that would participate in the research. The test was given to participants then the subjects that fulfilled the inclusion criteria underwent brain CT scan, and their behaviors were observed.The behavioral changes of the patients which were observed arerestlessness, irritability, anxiousness and being hostile.It was found that in 70% of the patients the changes that occur in the brain are almost the same, the changes were the presence of mild diffuse cerebral atrophy.In addition, 10% showed ischemia, cerebellar atrophy and the demyelination. 20% of the patients showed the presence of ethmoid sinusitis which might also be caused by the alcohol use disorder and might be related to the behavioral changes that were observed in these patients