Hi Dear , Welcome to HCM. Understanding your concern. Thanks for your query . Tonsillitis can be caused by virus like common cold or by bacteria like streptococcus bacteria which also cause sore throat (strep throat). Tonsillitis caused by strep throat if left untreated can lead to certain complications like difficulty in breathing , spreading of infection to surrounding or ear infection. Even sometimes infection can travel down the respiratory track and cause serious problems. I would suggest you to consult ENT specialist (ear ,nose,throat ) for proper examination and to rule out viral infection . Doctor may order blood test and throat swab test to confirm the diagnosis . He/she may prescribe antibiotics (amoxicillin ,penicillin or azithrimycin) ,decongestants ,mucolytic agents or sometimes antihistamine drugs also. For now take proper rest , do warm saline gargles several times a day , do betadine rinses for sore mouth which also due to throat infection and take ibuprofen (if not allergic) or acetaminophen for pain and swelling . Severe tonsillitis may also lead to removal of tonsil specially when they start interfering normal body functions . Hope your concern has been resolved. Please write a review about your experience with me and do click at i find this answer helpful if its valuable for you. Get Well Soon. Best Wishes, Dr. Harry Maheshwari