Hi welcome to the health care magic You can have repeated allergic inflammation of throat and sinuses Your investigation needs to be done with PNS x ray and CBC... Allergic testing also will be beneficial so that known allergen causing allergy can be detected... Symptomatic management done when allergic sinusitis occurs (with fexofenedine course) If recurrent tonsillitis attacks more then tonsillectomy might needed Hence consult otorhinolaryngologist or physician for examination and then if allergy suspected from history and from CBC then you will be advised to do allergy testing for further work up Hope your concern solved Let me know if having further query Take care