Scientific research has shown that diarrhea in early childhood leads to growth shortfalls. In this project, we propose a dynamic nonparametric model to estimate how the effects of diarrhea on childhood growth change over time and the length of this effect period. Carrying out the proposed research makes a significant contribution to the understanding of the dynamic effects of diarrhea, to the development of timely medical intervention, and to the improvement of the health of children at early ages globally, resulting in better social-economical status during their adulthoods.