Positive feedback is the opposite of negative feedback in that encourages a physiological process or amplifies the action of a system. Positive feedback is a cyclic process that can continue to amplify your body's response to a stimulus until a negative feedback response takes over.
Rhinitis or coryza is irritation and inflammation of the mucous membrane inside the nose. Common symptoms are a stuffy nose, runny nose, sneezing, and post-nasal drip. In rhinitis, the inflammation of the mucous membrane is caused by viruses, bacteria, irritants or allergens. The most common kind of rhinitis is allergic rhinitis, which is usually triggered by airborne allergens such as pollen and dander. Allergic rhinitis may cause additional symptoms, such as sneezing and nasal itching, coughing, headache, fatigue, malaise, and cognitive impairment.
Risk factors for non-allergic rhinitis include: Viral rhinitis-the lining of the nose and throat become inflamed when a virus attacks the area. Inflammation triggers the production of more mucus, which in turn leads to sneezing and a runny nose.Vasomotor rhinitis-blood vessels inside the nose should contract and expand, thus helping to control the flow of mucus.isk factors for non-allergic rhinitis include: Viral rhinitis-the lining of the nose and throat become inflamed when a virus attacks the area. Inflammation triggers the production of more mucus, which in turn leads to sneezing and a runny nose.