This will be a prospective observational study, which will be done over a period of one year (Upto 250 patients) after approval from ethics committee. The data of the first three months will be analysed (Upto 60 patients) and will presented as a thesis for MD (Anaesthesia). It will be carried out at Tata Memorial Centre, Mumbai. After Institutional Ethics Committee approval, Written informed consent in the language the patient understands the best will be obtained undergoing thoracic surgeries where the pleura is opened including Thoracotomy, Video Assisted Thoracic Surgeries (VATS). Data over a three months period will be collected. Pain at the incisional site and Ipsilateral shoulder pain (ISP) will be assessed separately using the numeric rating scale (NRS) during the patients' stay in the postanesthesia care unit (PACU) by an independent assessor, at 1 hour, 6 hours and 12 hours after coming to the PACU. The characteristics, intensity and pain at shoulder at rest and movement will also be assessed. Data including age, sex, BMI, American Society of Anesthesiologists (ASA) physical status, diagnosis, side and type of operation, surgical approach, positioning during surgery, duration of surgery, type of regional anesthesia, and, in patients with epidural anesthesia, level of catheter placement will also be recorded.