Purpose: The aim is to investigate the Assessment of Acute abdominal pain in ultrasonography. Methodology: A prospective Assessment of acute abdominal pain in ultrasonography was conducted for 8 months. During this time the data of experimented images were collected on daily basis along with the clinical history of patients and relevant vital signs also without ignoring the maintenance of equipment and factors adjustments of scanning parameters and the technique skill of the ultrasound used in the particular scan of the particular patients. Result: A study was conducted in department of radiology at SGT hospital to Assessment of USG in acute abdomen pain. Total 40 patients data used in this study who complain for acute abdominal pain during the period of study. Out of which 77.5% (31) patients undergo USG whole abdomen, 12.5% (5) patients undergo USG lower abdomen and 10% (4) patients undergo USG KUB (kidney, Ureter, Bladder). Result of scan collected and master chart is prepared. Author found that 12.5% patients having acute abdominal pain was due to cholilitheasis,12.5% patients have right renal calculus, 10% patients have left renal calculus, 20% patients have acute appendicitis, 7.5% patients have left ovarian cyst, 7.5 % patients have right ovarian cyst,5% patients have bilateral renal calculus, 5% patients have left Ureteric calculus, 2.5% patients have right ureteric calculus, 2.5% patients have uterine fibroid, 2.5% patients have right ovarian mass and 12.5% patients have normal scan no any findings. In rest 87.5% patients’ ultrasound help to diagnose the problem of acute pain. Patients were categorised to analysis of result of the study in two age groups which were 20-40years and 40-60 years. Only these two groups were made because all patients age within this age range. In age group20-40years there were total 27 patients out of which 14 were male and 13 were females. Two most common assessments in this group were acute appendicitis in 29.62% patients and left renal calculus 14.8 % patients, rest of the patients were diagnosed with several other findings like right renal calculus, hepatomegaly, cholelithiasis. And In age group 40-60years there were total 13 patients out of which 6 were male and 7 were females. Two most common assessments in this group were Cholelithiasis in 15.38% patients same results for the left ovarian cyst and second left renal calculus 7.69% patients, rest of the patients were diagnosed with several other findings like bilateral renal calculus, right ovarian mass, uterine fibroid, left ureteric calculus, right ureteric calculus also carry the same percentage 7.69%. Results came out after this study was as follows as shown in table 5.1, 5.2 & 5.3. Table 5.1 shows the analysis of results of USG scan of patients having acute abdominal pain and age range 20-40years. Conclusion: It is concluded that ultrasound is the best modality to rule out the problems at earlier stage so that treatment can be started on behalf of reports of Ultrasonography scan in patients of acute abdominal pain, as it is fast and safe to patients, it does not includes any ionising radiation so female patients of reproductive age go through scan without any risk. And most common reason of acute abdominal pain as per this study is acute appendicitis, 20% patients having acute appendicitis when USG was performed. 12.5% patients have normal scan no any findings. In rest 87.5% patient’s ultrasound help to diagnose the problem of acute pain.