Unclear speaking voice may be caused by short tongue tie, pronunciation habits, cerebral thrombosis, etc., which need to be treated according to the specific causes. 1. Short tongue tie: short tongue tie is mostly seen in pediatric patients, which can affect tongue function and pronunciation, and can be solved by surgical treatment, including tongue tie incision and tongue tie plasty. 2. Pronunciation habits: Adults with unclear speech may be caused by pronunciation habits. You can correct your bad pronunciation habits by reading along with newspapers, books, etc., and carrying out standardized voice training. 3. Cerebral thrombosis: Cerebral thrombosis is often seen in elderly patients, the thrombus can compress the speech center of the brain, resulting in sudden slurred speech, and in severe cases, hemiparesis and impaired consciousness. It is recommended to go to the hospital immediately and follow the doctor’s instructions for treatment. It is recommended that patients seek medical examination in time to clarify the cause of the disease and actively cooperate with doctors for treatment.