Nodules on the posterior wall of the nasopharyngeal roof may be nasopharyngeal inflammation, nasopharyngeal cyst, nasopharyngeal carcinoma, etc., so they are not necessarily tumors. 1. Inflammation of nasopharynx: As nasopharynx is connected with the outside world, there are more lymphatic tissues in this part, so when suffering from chronic inflammation of nasopharynx, lymphoid follicular hyperplasia can appear in the posterior wall of nasopharyngeal parietal, showing nodular manifestation. 2. Nasopharyngeal cysts: Nasopharyngeal cysts are caused by abnormal embryonic development, which is relatively rare, and clinically there are often headache, tinnitus, hearing loss and other symptoms. 3. Nasopharyngeal cancer: If there are obvious nodules on the posterior wall of nasopharyngeal parietal, accompanied by symptoms such as hearing loss, bloody nasal discharge, nasal congestion, tinnitus and so on, it is necessary to consider the possibility of nasopharyngeal cancer, which needs to be clinically diagnosed through histopathological examination. Nodules on the posterior wall of the parietal of the nasopharynx need to go to the hospital in time to check the specific cause and standardize the treatment, so as to avoid delaying the condition.