Unclear speech is related to the tongue tie to a certain extent, but it can also be caused by hearing impairment, mental retardation, and so on. 1. When the tongue tie is normal, it is normal for the tongue to stick out or pronounce words. If the tongue tie is too short, it will affect the flexibility of the tongue, and the tongue will not be able to stick out of the mouth, especially when the tongue is not pronounced clearly, which will lead to unclear speech; sometimes, unclear speech exists together with hearing impairment and mental retardation. 2. Short tongue tie may be caused by congenital maldevelopment, such as lack of trace elements and vitamins during pregnancy, some bad habits such as smoking, drinking, and some medicines can lead to short tongue tie. If you have a short tongue tie, you will need to undergo tongue tie lengthening surgery; if you have intellectual disability, you will need to go to the pediatric department of the hospital in time to avoid delaying your condition.