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.
Tonsillitis Tonsillitis is painful swelling in the tonsils, causing sore throat, red tonsils, pain, fever, and more. Drug allergy A drug allergy is an allergic reaction to a medication and can cause a rapid heartbeat and difficulty breathing. Anaphylactic shock Anaphylactic shock is a sudden severe allergic reaction marked by breathing trouble, a tight throat, and more.