Studies show that smoking increasing the risk of allergic reactions triggering. This is due to the degradation it has on your body. The Journal of Allergy and Clinical Immunology studied tobacco smoke and allergies. Their findings revealed an interesting conclusion. It thus showed that people who have ragweed allergies and inhale second hand smoke have higher allergic risk. The chance of an allergy flaring proved sixteen times higher than in a non smoker. It is therefore best to quit smoking if you suffer from many allergic conditions.