Background for the study: With the impact of optional vaccines and advanced developmental care the parents are ready to walk an extra mile in the care of children. The aim of the study was to determine the effect of maternal lock on pain perception in children during immunization. Methodology: The study was conducted in an immunization clinic of a selected hospital at Pathanamthitta district. Quasi experimental one group post-test only control group design was used and study subjects included a convenient sample of 140 children, aged in between 0-6 years were divided intro control and experimental groups. The purpose of the study was well explained to the mother and consent was obtained. The children who were held by the mother for vaccination were randomly selected and intramuscular vaccine was administered. The pain perception was analysed using FLACC pain scale. Results: The experimental group who were held by mothers for receiving intramuscular immunization had significantly lower pain scores than the control group. The pain perception of the children who were held by own mothers demonstrated less pain than held by the father/ care giver.
