I have recently noticed that when I am concentrating, I stick out my tongue about a half inch between my lips. This is very disturbing because my mom, now 84 yrs, has always done that, but in the last 10 years, it's gotten worse and when she concentrates on anything, her tongue is often sticking out by its entire length and looks creepy. I don't want to get like that. I am a very healthy 58 year old runner and triathlete.