Abdominal colic is a common complaint in early infancy and may be characterized by excessive crying, abdominal distension or firmness, flexion of the legs toward the abdomen, and clenched hands. I Love You (ILU) massage is a non-pharmacological intervention that may provide comfort and support digestive function. This study aimed to determine the effect of ILU massage on the level of abdominal colic in infants aged 0–3 months. A quantitative quasi-experimental one-group pretest-posttest design was used. The sample consisted of 35 infants aged 0–3 months experiencing abdominal colic in Temperak Village, Sarang District, Rembang Regency. Colic was assessed using a questionnaire completed by mothers/caregivers before and after the intervention. ILU massage was administered once daily for 15 minutes over three days. Data were analyzed using the Shapiro–Wilk normality test and paired-samples t-test, with Cohen’s d used to estimate effect size. Before the intervention, 18 infants (51.4%) had moderate colic, 13 (37.1%) had severe colic, and 4 (11.4%) had mild colic. After the intervention, 21 infants (60.0%) had mild colic, 13 (37.1%) were no longer categorized as having colic, and 1 (2.9%) had moderate colic. The mean colic score decreased from 11.34 to 5.26, with a mean difference of 6.09. The paired-samples t-test showed p < 0.001 and Cohen’s d = 3.61. These findings indicate a significant difference in abdominal colic levels before and after ILU massage. ILU massage may therefore be considered a supportive non-pharmacological approach for reducing colic symptoms, although the absence of a control group limits causal interpretation.