A meatball on the left side of the throat may be caused by tonsillitis, laryngeal papilloma and other diseases. 1. Tonsillitis: the occurrence of this disease is related to pathogenic microbial infections, such as staphylococcus, adenovirus, toxoplasma gondii, etc. It is also related to the lowering of immunity, the stimulation of inflammation in neighboring organs, measles and other causes. It can be triggered by excessive smoking and alcohol, overwork, humidity and other factors, resulting in patients with enlarged tonsils, which can be manifested as a meatball on the left side of the throat, mostly accompanied by pharyngeal pain, dysphagia and other symptoms. 2. Laryngeal papilloma: the etiology of this disease is not clear, mostly considered to be caused by human papilloma virus infection, often due to chronic inflammatory stimulation, endocrine disorders and other factors. Through the examination can be found on the left side of the throat there is a meatball, the tumor is larger will appear laryngeal foreign body sensation, cough, hoarse voice and other symptoms. There are many reasons why there is a meatball on the left side of the throat, so it is necessary to go to the hospital to have a relevant examination to clarify the cause of the disease.