Hello,
Thank you for your query at DoctorSpring.com
I understand your concern.
Until and unless there is direct ingestion of the chemical it can't produce any sytemic effects.
If it happens to go to your pillow, and you chew on it, the tongue because of the sensation can burn a bit, but definitely there is no question of any systemic absorption. So, do not worry. The tongue will be normal in couple of days time.
Regards,
Dr. Jay