Clinically, there is no accuracy in the method of self-examination of pharyngeal cancer, which can be diagnosed through clinical symptoms, imaging examination and pathological examination. Generally speaking, self-examination is not recommended, and it is recommended to consult hospitals for examination as early as possible. 1. Clinical symptoms: symptoms of laryngeal cancer vary according to the location of the disease, but hoarseness, discomfort in swallowing, sore throat, dyspnea, dysphagia, etc. are common. 2. Imaging examination: clinically, laryngeal cancer patients can improve X-ray, CT, ultrasound and other imaging examinations, which can help to determine the size and location of the tumor and whether there is distant infiltration. 3. Pathological examination: histopathological examination is an important basis for confirming the diagnosis of laryngeal cancer. Most of the laryngeal cancer tissues are brittle and easy to be extracted by forceps, but some of the nodules and masses may need repeated biopsies to be confirmed. There is no accuracy and scientificity in the self-examination of laryngeal cancer. Once patients have clinical symptoms such as unexplained sore throat, hoarseness, recurrent cough, etc., they should go to the hospital as soon as possible, and cooperate with the doctor to improve the relevant examination, so as to make clear whether they are suffering from laryngeal cancer or not.