Background: Undernutrition is a condition in which nutrients are insufficiently consumed, poorly absorbed, or lost excessively. Overindulgence or excessive intake of particular nutrients are the main causes of overnutrition. Protein-calorie malnutrition (PCM), which is caused by a lack of macronutrients like protein, carbs, and fat, is one of the most significant nutritional issues, affecting hundreds of millions of pregnant women, the elderly, and small children in particular. Methodology: Children with protein energy deficiency between the ages of 6 months and 5 years old participated in this study at the department of paediatrics. A thorough comprehensive examination and history were performed. Results: The most frequent symptoms in our study were fever 85.34%, vomiting 49.50%, and cough 42.50%. In children decreased feeding was present in 35.29 percent of cases, loose stools were present in 36.28 percent of cases, oedema was present in 28.04 percent of cases, weight loss was present in 17.96% of cases, dyspnea was present in 17.84 percent of cases, abdominal pain was present in 20.16 percent of cases, and convulsions were present in 7.24% of cases. Prevalence of malnutrition in maximum in Grade II.