The inability to extend the tongue in the elderly may be caused by short tongue tie, adhesion of the tongue and damage to the lingual nerve. 1. Short tongue tie: It may be due to the short tongue tie of the elderly, which will affect the normal movement of the tongue, resulting in the restriction of tongue forward and upward movement. 2. Tongue adhesion: If the elderly have tongue or floor of mouth tumor adhesion, it may also lead to the patient’s inability to extend his/her tongue. 3. Damage to the lingual nerve: In addition, if the lingual nerve of the elderly is damaged for various reasons, it may also lead to impaired control of the tongue, thus leading to the phenomenon of inability to extend the tongue. There may also be other reasons for the inability to extend the tongue, such as cerebrovascular disease causing tongue movement disorder. It is recommended to go to the hospital for a detailed examination to identify the cause of the problem and treat it actively.