Hello Rachel, Food allergy with lip tingling and swelling (angioedema) is likely provided you get the feeling immediately after eating the offending food. Any foods can cause this, but has to be almost immediately or within the hour. Blood pressure pills such as enalapril, captopril, trandolapril, lisinopril etc so please ensure your current medications are checked with your doctor if you are on any.. If now food allergies are unlikely, then this is idiopathic angioedema and you need to be on cetirizine 10mg once daily for 1 month to see if this recurs. If it still recurs on antihistamine, please get complement proteins C3 C4 leves checked. Best Wishes.