Chronic tonsillitis is a common inflammatory disease of the tonsillar tissue that causes various ENT pathologies. Microbiological studies have shown a possible correlation between tonsillitis and Helicobacter pylori. Patients with chronic tonsillitis and H. pylori infections have a higher risk of complications. PCR testing revealed H. pylori DNA in 30.8% of patients with chronic tonsillitis, compared to a lower rate in healthy volunteers. Complications of chronic tonsillitis include infectious endocarditis, scarlet fever, and psoriasis. Carcinoma of the tonsil may be a possible complication in patients with tonsillitis and H. pylori. Detecting markers of H. pylori in oral cavity and eradicating the pathogen is recommended for patients with chronic tonsillitis.