no need to worry but i need further information 1. u r age 1. are u smoker 2.any persistent cough,fever ,night sweats ,wt loss 3.have you taken any blood investigations recently 5.any history of hypertension or currently on any medications if u dont have above symptoms probably its just pharyngeal wall erosion caused due to throat infection its advisable to do chest x-ray pa view and complete blood count if symptoms persists and to consult ent or chest physician. i would be glad to provide answers to any further queries. Thanks for using HMC Have a good day! Regards Dr. V.KUMARAGURU general surgeon