Pain is an unpleasant sensation localised to a part of the body that everyone experiences at least once in their entire life. Prompt relief of pain instils a massive confidence in the patient regarding the doctor’s ability to treat effectively. It is a cross– sectional study, conducted in Intensive Care Unit, Saveetha Medical College and Hospital . A total of 100 patients were included in the study. A special book was maintained to collect the data from the patients. All the patients were questioned or assessed by the principle investigator. NRS was used for patients who were able to communicate and BPAS was used for patients who were not able to communicate like those who were critically ill, sedated and mechanically ventilated patients. Even during rest intensive care unit patients are having pain which increases the chance of chronic pain and posttraumatic stress disorders. Best ways to screen the patients for pain is grading of pain routinely after procedures using various pain assessment technique.