Lung infection with phlegm ate cefaclor voice is still a little mute, the possible causes for acute laryngitis, vocal cord inflammation, vocal cord nodules, cephalosporin allergy and so on. 1. Acute laryngitis: it is an acute inflammation that occurs in the mucous membrane of the throat, and the common causes include cold, tobacco, alcohol and spicy food stimulation, allergies, infections, and low immunity. Acute laryngitis can also be triggered in patients with lung infections. Common symptoms are hoarseness, sore throat and cough. 2. Inflammation of the vocal cords: Hoarseness may be caused by reasons such as talking loudly, talking for too long, taking food or medication allergies, and so on. It is recommended to take proper rest and drink plenty of warm water. Promptly identify the food or drug that caused the allergy and avoid consuming it again. 3. Vocal cord nodules: such as excessive or improper use of voice, infection, contact with irritating substances, etc., may cause vocal cord nodules, which can cause intermittent hoarseness. 4. Cephalosporin allergy: due to physical reasons, patients taking cephalosporin may have caused allergic laryngitis, mainly manifested as throat discomfort, cough, hoarseness and so on. In addition to the above reasons there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.