The reason im wondering is because alot of times certain inhalers will mess with your tongue such as making it numb and swollen, making it wierd colors, or sometimes even ooze out puss and phlem, A few of the inhalers that will do this unless you rinse your mouth out after every actuation are,
Combivent, Flovent, ADVAIR or even some nose sprays that hit the back of your tongue. Let me know...Peace!