Four-year-old speech unclear as an abnormal phenomenon, need to pay attention to the examination to exclude possible related factors, specifically including the following aspects: 1, check whether there are adenoids, tonsils hypertrophy: adenoids, tonsils hypertrophy will block the pharyngeal cavity resulting in narrowing of the pharyngeal cavity, the resonance of the pharyngeal cavity is affected, the speech will have a sound containing things, unclear performance. If the adenoids are enlarged and the tonsils are enlarged, surgery can be considered to remove the enlarged tonsils and adenoids to improve the function of the pharyngeal cavity and improve the unclear speech. 2. Must need to first determine whether the hearing is normal, if there is a mild to moderate hearing loss, should be timely fitting appropriate hearing aids, for improving hearing is more helpful. After improving the hearing, you can hear normal sound in order to learn to speak normally and speak clearly gradually.