Caudal injections of bupivacaine are commonly used in children undergoing lower abdominal and urogenital surgery to provide intraoperative analgesia. There is paucity of literature regarding use of bupivacaine with morphine in caudal analgesia for post-operative analgesia. This study has not been done earlier in our institute. Hence we plan to compare efficacy and possible side effects of bupivacaine versus mixture of bupivacaine and morphine when used in caudal analgesia for post-operative analgesia. A prospective, randomized controlled study will be conducted on patient with ASA I/II physical Status undergoing lower abdominal surgeries under general anaesthesia  after obtaining approval from the hospital ethics committee. Prior written informed consent will be taken from parents of all the patients in the language they understand. Total number of patients 100 will be enrolled and divided into two group: GROUP –I (n = 50) will be receiving Caudal analgesia with bupivacaine 0.25% (1 ml kg^-1) GROUP-II (n = 50) will be receiving Caudal analgesia with bupivacaine 0.25% (1 ml kg^-1 ) and morphine 40 mcg kg^-1. Pain assessment will be done using  FLACC score which will be recorded at 0, 4, 8, 12 and 24 hrs after surgery by the observer. Rescue analgesia will be given for FLACC score ≥ 4 in the form of Inj. Paracetamol 15 mg kg^-1 intravenous. The study will be a double blind randomly allocated design. Local or systemic complications throughout the study will be recorded and managed accordingly. There is no conflict of interest.