They are important members in inflammation and contain chemical substances known as histamine. This histamine are very important for inflammation, too. Connection of IgE antibodies and allergens that are attached with basil cells as well as with mast cells too, making changing cell membranes, which is cause of substance's leaking out into the tissue's surrounding. Next reaction of your body with contact of some of these allergens will be showed with the symptoms of allergens, such as: skin rashes, sneezing, swelling, itching, wheezing, difficult breathing, coughing, anaphylaxis or even in the worst case death. The most famous reasons that cause dog allergy are dog's dander, urine or saliva. " People often think that the two are interchangeable and mean the same thing, when the truth couldn't be any farther. The differences between these two conditions are vast. For food intolerance it could be said that is rarely life threatening. It usually shows symptoms such as migraines, skin rashes, and in some cases asthma. The most usually allergies reactions on food are for food such as: fish, shellfish, peanuts and nuts. Majority people are outgrow their food allergies, but there are and people who are allergic on certain food for whole life. In that case the best solution is to avoid these foods. So, before you have to eat something, it is recommendation to read all ingredients for that you need to eat. Allergy may be defined as condition in which immune system react to the foreign substances which are not harmful and as results of it immune system makes antibodies that lead to the symptoms which are related as allergies, such as difficult breathing, itchiness, swelling, etc. One of the useful option as prevention to the allergies is to use product related as allergies, created to help people for avoiding symptoms of allergy. Also, it is important to mention that decongestants and antihistamines may have side effects. Some of most noted are dizziness, loss of appetite, blurred vision, stomach upset, drowsiness, irritability, restlessness and other. That's why it is necessary to consult with your doctor before you start with using these.