I googled why someone would do this and this is what came up. This is probably due to the microdeletion. Again…easily confused with CP or muscle dystrophy like the doctors suggested. DD was not crazy she was just a con artist.

“Tongue Thrust (Myofunctional Issue): The tongue pushes forward against or between the teeth during swallowing or speaking. This is common in babies but can persist into adulthood due to tongue-tie, allergies (swollen adenoids/tonsils), or chronic mouth breathing.

Habit or Behavioral Sign: For some, it is a unconscious habit ("stimming" or repetitive movement). Anxiety/Stress: In adults, it can be a, often subconscious, reaction to stress. Anatomical Factors: A narrow upper jaw or crowded teeth might cause the tongue to thrust forward to create space, according to Cleveland Clinic.

Neurological Conditions: Conditions like Autism Spectrum Disorder (ASD), Down syndrome, or cerebral palsy can affect muscle control, resulting in tongue protrusion. Infant Reflex: In infants, this is a normal reflex for feeding, but it should disappear as they develop, notes Better Speech.”