Cough and sore throat after tonsillectomy is considered to be caused by acute pharyngolaryngitis, chronic pharyngolaryngitis, and unhealed tonsil surgery wounds. 1. Acute pharyngitis: after tonsillectomy, when acute pharyngitis is caused by certain reasons, the throat is congested, edema, increased secretion and other abnormalities, which can cause coughing, coughing up phlegm, sore throat, fever and other symptoms. 2. Chronic laryngitis: If cold, long-term smoking or drinking, eating too much spicy and irritating food, talking too long, etc. can cause acute attack of chronic laryngitis, cough, sore throat and other symptoms. 3. Tonsil surgery wound is not healed: If the surgical wound after tonsillectomy is not completely normalized, it can be painful when coughing which involves the throat area. Cough and sore throat after tonsillectomy, you need to go to the hospital in time to find out the specific reasons.