A sore throat on the right side may be caused by peritonsillar abscess, tonsillitis, and acute pharyngitis. 1. Peritonsillar abscess: Inflammation in the tonsillar crypts, especially in the upper tonsillar crypts, due to the obstruction of the crypts, the bacteria or inflammatory products destroy the epithelial tissues, and develop deeper into the crypts, penetrate the tonsillar peritonsillar membrane, and enter into the tonsillar peritonsillar space, forming cellulitis, followed by the formation of abscesses. This disease can be manifested as one side of the sore throat, especially when swallowing. 2. Tonsillitis: mainly due to bacterial, viral and other pathogenic microbial infections, and tonsillitis patients usually have obvious symptoms of fever and sore throat. When the right side of the lesion attacks, there can be right side of the sore throat. 3. Acute pharyngitis: mainly caused by bacteria, germs, fungi and environmental stimuli, etc. Patients usually show symptoms such as dry and itchy throat, pain, burning, coughing and phlegm. When the inflammation area occurs in the right side of the throat, the right side of the throat pain can occur. In addition, right tonsil cancer, wisdom teeth pericoronitis can also cause right side of the sore throat, it is recommended that patients go to the hospital for a detailed examination in a timely manner, to clarify the cause of the disease, and target treatment.