Mexican-origin families (MO) have been more negatively impacted by the COVID-19 pandemic compared to White European-Americans. Latinx youth also reported increased concern about somatic symptoms (i.e. bodily symptoms) during the pandemic compared to non-Latinx peers. Current research on the pandemic indicates that cohesive and supportive families fare better than families within high-conflict households. However, no research has directly examined parent-child conflict during the pandemic in relation to youth somatic symptoms. Previous studies considered cultural proxies as predictors of somatic symptoms in Latinx children, the specific influence of prominent cultural values like familism remains less explored. Familism, emphasizing family well-being, is considered protective for Latinx youth, but evidence suggests it may pose risks in high parent-child conflict households. Utilizing Qualtrics panel, I collected data from 301 MO parents reporting on a target child (Mage= 11.4 years, SD= 3.7; 50.2% female) between March and June 2022. Approximately 40% of parents completed the survey in Spanish. Parental familism dimensions (support, family as referent, and obligations) were assessed as well as youth somatic symptoms. Changes in parent-child conflict and changes in social and family contacts due to the pandemic were also measured. Logistic regression models revealed that greater increases in conflict significantly predicted the presence of youth somatic symptoms (OR = 0.52, 95% CI= [0.27, 1.00]. Unexpectedly, total familism did not significantly moderate the relation between change in parent-child conflict and the presence of somatic symptoms (RR = 1.16, 95% CI= [0.99, 1.36]. However, post hoc analyses revealed that parental familism support was the only dimension of familism that was directly associated with the count of child somatic symptoms (RR= 0.81, 95% Confidence Interval [CI]= 0.71, 0.93). Parental familism as a referent significantly moderated the relation between change in parent-child conflict and the count of somatic symptoms (RR= 1.19, 95% CI = [1.01, 1.41]), such that higher familism values strengthened the positive relationship of change in parent-child conflict and higher count of somatic symptoms. Findings emphasize the need for future longitudinal research, considering medical conditions, to understand how parental familism values, particularly support, may buffer against somatic symptoms for Latinx youth.