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.
Hay Fever (Allergic Rhinitis) Hay fever (allergic rhinitis) is an irritation of the nose caused by pollen and is associated with the following allergic...learn more Â». In This Article. Hay Fever (Allergic Rhinitis) Article Hay fever facts.