Q: what makes someone allergic to what they are allergic to... if that makes any sense...
A: 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, or allergic, reaction. MAKE ME BEST ANSWER DUDE!=]