Inadequate routine healthcare check-up visits for children aged three to five years impose substantial economic and social burdens due to morbidity and mortality. The absence of regular well-child visits and vaccinations leads to avoidable diseases, underscoring the need for a renewed emphasis on childhood immunizations and check-ups. Out of 160 articles initially screened after removing duplicates, 45 were chosen for full-text review following initial title and abstract screening by two independent reviewers. Afterward, 20 studies met the predefined inclusion criteria during the final assessment of full-text articles, and data were systematically extracted from these selected studies using standardized forms to ensure accuracy and consistency. Well-child visits promote holistic development, health, and well-being in children aged three to five years. Following established guidelines and evidence-based practices, healthcare professionals provide assessments, vaccinations, and guidance for a healthy future. Despite challenges, well-child visits are vital for preventive care, empowering informed decisions for children's growth and development. The benefits of well-child visits encompass growth monitoring, anticipatory guidance, and preventive measures, crucial for children with chronic illnesses. Key components include comprehensive assessments, developmental screenings, vision and hearing evaluations, immunizations, health education, and counseling. In the case of juvenile diabetes, parental education is paramount. Parents need to understand the intricacies of insulin administration, including proper dosage calculation based on glucose measurements, meal planning, and the importance of timing insulin injections. Implementing guidelines and principles by organizations such as Bright Futures and the American Academy of Pediatrics ensures holistic care, parent involvement, and evidence-based practices. This review explores best practices and guidelines for such visits, emphasizing their role in monitoring and promoting children's development.