Nasal speech can be caused by upper respiratory tract infections, rhinitis, nasal polyps or enlarged adenoids. Depending on the situation, different treatments can be taken, such as medication, nasal irrigation or surgery. 1. Upper respiratory tract infection: After upper respiratory tract infection, the mucous membrane of the nasal cavity will become edematous and secrete mucus, so there will be nasal sound in speech. It can be treated by taking drugs such as cefuroxime, roxithromycin and azithromycin. 2. Rhinitis: Rhinitis leads to a large amount of nasal mucus inside the nasal cavity, accompanied by swelling and congestion of the nasal mucosa, so there will be the case of nasal speech. Patients can use saline to rinse the nasal cavity, to keep the nasal cavity open and the mucous membrane moist, can also apply glucocorticoid nasal spray, such as budesonide nasal spray, etc.; Nasal decongestant, such as furosemide nasal drops, etc.; so as to alleviate the situation of speaking with nasal voice. 3. Nasal polyps: patients with nasal polyps occupy most of the space in the nasal cavity, resulting in smaller resonance cavities, so nasal voice. Functional endoscopic nasal sinus surgery can be performed. Nasal polyps can be removed very well. 4. Adenoid hypertrophy: it is usually caused by adenoid hypertrophy during growth and development, nasopharyngitis repeated episodes of stimulation of adenoids, thus appearing to speak with nasal sound. Can go to the hospital for nasal endoscopy, can be general anesthesia nasal endoscopy for adenoidectomy. Patients should go to the hospital in a timely manner, under the diagnosis of the doctor to determine the cause of the condition, and follow the doctor’s instructions for medication or treatment.