My tongue feels bigger today. What might cause that?

Inflammation. If you have normal blood pressure at age 34, then your tongue may be swollen from inflammatory causes such as temperature or chemical triggers in hot spices. You may have a food allergy causing the tongue to swell. Some people take blood pressure medications in the class called ace inhibitors like lisinopril. There is a condition called angioneurotic edema of the tongue due to an enzyme deficiency.