When in certain condos i experience rapid heartbeat, flushed face, tingling feet, shallow breathing, tight chest, dizziness. why?

I don't: Know. Maybe there is something in those situations or locations that you are sensitive to. Try to figure out any associations or similarities with the episodes.

Allergic Reaction: An allergic reaction is the body's way of responding to an "invader." when the body senses a foreign substance, called an antigen, the immune system is triggered. The immune system normally protects the body from harmful agents such as bacteria and toxins. Its overreaction to a harmless substance (an allergen) is called a hypersensitivity reaction, or an allergic reaction.