Most allergens enter the body through the respiratory system (nose, pharynx, larynx, trachea, bronchi and lungs).
Allergy Symptoms stimulation in the upper respiratory system can result in :
1. Sneezing 2. Runny nose, 3. Nasal Congestion, 4. Scratchy throat,
5. Post-nasal drip, 6. Itchy eyes and nose, 7. Watery eyes.
Allergy Symptoms stimulation in the lower respiratory system may produce
1. Chest tightening, 2. Wheezing 3. Breathing trouble 4. Coughing.
When Allergy Symptoms stimulate the stomach and intestines, they can cause :
1. Nausea, 2. Vomiting, 3. Diarrhoea.
Sometimes an allergic response results in hives or a rash.
Anaphylaxis, the most severe allergic reaction, results when an allergen causes a reaction in the circulatory system ( blood, heart and chest). During anaphylaxis, blood vessels relax and lose fluid. This causes blood pressure to drop, which can make you dizzy. The fluid also leaks into surrounding tissues, causing them to swell. If the swelling is severe, it can restrict your airways, making it impossible to breathe.