How do you know if you have had an allergic reaction to the numbing agent that you were given before a filling at the dentist's office?

Injection has epinephrine in it the same thing given in allergic reaction. Usually if reaction has to occur it happens in the first 5-10 min of injection. If later it happens patient presents wid swelling or puffiness of lips. The allergy occuring later are due to the rubber dam or the latex gloves of the dentist thn the injection.