There is a meatball on the left side of the tonsil without pain or itching may be tonsil polyps, tonsil papilloma, tonsil cysts and so on. 1. Tonsil polyps: the formation of tonsil polyps is related to the repeated stimulation of the tonsil mucosa by chronic inflammation. After bacteria, viruses and other pathogens cause inflammation, tonsil mucosa self-repair process, may lead to part of the mucosal cells abnormal proliferation to form polyps. 2. Tonsillar papilloma: this disease is often asymptomatic in the early stage, belongs to benign tumors, mainly due to viral infections, is a common tumor in the throat area, the tumor occurs in the arch of the jaw, tonsils, soft palate edge and other parts of the body. 3. Tonsillar cysts: due to pharyngeal infection and repeated inflammatory stimulation and other factors lead to gland secretion blockage, followed by the formation of grayish-white cystic protrusions, usually occurring in the surface of the tonsil crypts, no obvious symptoms in the early stage, with the gradual increase of the tumor, there may be pharyngeal discomfort, foreign body sensation. It is recommended that the patient actively consult a doctor for a clear diagnosis, and actively cooperate with the doctor for standardized treatment after determining the cause of the disease.