Background: Congenital Diaphragmatic Hernia (CDH) is a diaphragm abnormality it permits stomach contents to protrude into the thoracic cavity, posing a substantial risk for pulmonary and cardiac problems in newborns. The pathophysiology of congenital diaphragmatic hernia is a combination of lung hypoplasia and immaturity associated with Persistent Pulmonary Hypertension (PPHN) in newborns and cardiac dysfunction. Case Presentation: A 1-year-old male patient was admitted to the hospital with chief complaints of excessive crying, breathlessness, and fever for one month. On examination, we observed decreased air entry on the right side in the inframammary area, and no air entry in the infra-axillary area. The Ultrasonography (USG) of the chest showed bowel loops along with mesentery. Surgical correction is required for a diaphragmatic hernia. Right thoracotomy, laparotomy, and repair of hernia were done Conclusion: The Prior diagnosis during the pre-natal period induces a better prognosis.