The cause of sudden deafness is usually unknown. There are two main theories, firstly, the viral infection theory and then the inner ear blood supply disorder theory. In the study, it can be observed that the inner ear has different degrees of water accumulation, so the dietary contraindications for patients with sudden deafness are as follows: 1. If excessive salt content is consumed, it may increase the water content in the inner ear and lead to the aggravation of sudden deafness symptoms or poor healing, so patients should have a low salt and low fat diet; 2. Avoid eating spicy and stimulating foods; because sudden deafness has a certain possibility of viral infection, patients should pay attention to rest in daily life and avoid strenuous activities.