Introduction
 Infectious diseases of the faucial tonsils are most frequently encountered by Oto-rhino-laryngologists. Vitamin D has got an important role in the production of surface Anti-microbial peptides (AMPs). Overall, the active form of vitamin D plays a vital role in maintaining the immune system of the body. This study aims to evaluate the association of vitamin D deficiency in chronic tonsillitis among paediatric age group.
 Materials and Methods
 It is a clinical study carried out in the Department of Oto-rhino-laryngology and Head and Neck surgery at a medical college in Ballari, Karnataka, India from January 2018 to January 2019 for the time period of 12 months. Patients were evaluated with the relevant investigations and digital X-ray nasopharynx along with serum Vitamin D level assessment.
 Results
 A total of 60 children with chronic tonsillitis were enrolled in this study. There were 26(43.3%) male children and 34(56.7%) females, ranging in age group from 5 to15 years, mean age is 9.82. The common clinical presentation was recurrent episodes of throat pain seen in all the patients (100%). On serum 25-hydroxyvitamin D assessment, 40(66.7%) patients were found to have deficiency and 20(33.3%) patients were having insufficiency. Mean is 17.99ng/ml and ranging from 9.13-28.58ng/ml.
 
 Conclusion
 The study concludes that, the serum vitamin D levels in chronic tonsillitis among the paediatric age groups is found to be below normal levels and is unrelated to the socio demographic factors.