Allergies occur when our immune system reacts negatively to normally harmless substances in the environment. During Christmas some people suffer from allergies as a result of being exposed to allergic substances. If you are suffering from symptoms that include sneezing coughing a blocked and stuffy nose watery itchy eyes and throat it could be a winter allergy attacking your respiratory system. If it’s a winter allergy here are some common allergy triggers around the festive period and tips on how to avoid them to ensure your allergies don’t ruin your festive mood reports femalefirst.co.uk: - Christmas jumpers: Wool contains Lanolin-