Heavy nasal sound is caused by nasal congestion, may be sinusitis, allergic rhinitis, nasal polyps, deviated septum and other reasons, according to its cause to give medication, surgical treatment and so on. 1. Sinusitis: sinusitis causes mucosal congestion, edema, nasal congestion, nasal sound, you can apply saline rinse nasal cavity, to promote nasal secretions out of the nasal cavity, the application of mometasone furoate nasal spray nasal relief of local edema, if the bacterial infection, can be given to cefdinir, cefradine, etc. to control inflammation and alleviate the symptoms. 2. Allergic rhinitis: contact with allergens causes acute attacks, resulting in nasal congestion, nasal voice, nasal itching, can be given saline rinse nasal secretions, the application of budesonide nasal spray nasal spray, oral cetirizine, loratadine, montelukast sodium and other drugs to relieve the nasal voice. 3. Nasal polyps: Nasal polyps cause nasal congestion and nasal voice, you can consider removing the polyps under nasal endoscopy. 4. Deviated nasal septum: The structure of nasal septum is abnormal, and it is deviated to one side, which causes nasal congestion and heavy nasal sound. Surgery can be considered, such as septoplasty and septum correction to remove the heavy nasal sound. It is recommended to consult a doctor in time to find out the cause of the nasal sound and treat the cause of the problem.