Itchy eyes are often caused by some type of allergy. An irritating substance, which can be an allergen like pollen, dust,and animal dander, causes the body to release chemicals called histamines in the tissues around the eyes. This may result in itching, redness, and swelling. Medicated eye drops are usually the go-to treatment for an eye inflammation due to an allergy, also called allergic conjunctivitis.
The nose does a lot more than let air pass through it. It warms the air and adds moisture to it before it gets into the lungs. The nose also traps foreign tiny particles, keeping them out of the lungs. Allergies to both indoor or outdoor substances like pet dander, pollen, and even dust mites can cause an irritating inflammation in the nose that may make the nose itch.
When your nose has come in contact with allergens, the body releases chemicals such as histamines and leukotrienes. Blood vessels swell, causing nasal congestion, and mucus production increases, which leads to a stuffy nose.
When the body comes in contact with allergy triggers like pollen, it releases chemicals called histamines, which may lead to congestion. Congestion may make you breathe through the mouth, which can dry out the throat. Mucus may then drip down the back of the throat. That can irritate and inflame the throat, which can make it feel sore.
Nasal discharge is mucus flowing down the throat and out of the nose, usually as a result of allergies or having a cold. The role of mucus is to trap bacteria, germs, and allergens from making their way into the lungs. Allergens are irritants the body thinks are harmful bacteria and therefore reacts by causing a runny nose in order to flush the irritants out and prevent them from getting into the lungs.