Anyone who suffers from allergies can attest that their headaches, sneezing, runny noses and hives are not the result of a psychosomatic reaction. So why is it that some people insist that you’re making up your symptoms? As Dr. Andrew Weil told Discovery Health, “Emotional stress can precipitate allergic reactions, and relaxation techniques can moderate them. A person who is strongly allergic to roses, for example, may react to the sight of a plastic rose, demonstrating the involvement of the mind and the brain.” In other words, you’re not making anything up, but your brain might trick you into thinking that you are.