A rheostat is a device which is used to vary the resistance in an electrical circuit without interrupting the circuit.heostats are a kind of potentiometer. These devices can be used in a variety of settings, and are usually designed to be sealed so that environmental factors cannot interfere with the function of the circuit.
This chemical can cause allergic rhinitis and its symptoms, including a runny nose, sneezing, and itchy eyes. In addition to tree pollen, other common allergens include: grass pollen
Nature of symptoms. Symptoms of rhinitis consist of rhinorrhea, nasal congestion, postnasal drainage, repetitive sneezing, and itching of the palate, ears, nose, or eyes. Snoring, frequent sore throats, constant clearing of the throat, cough, itchy eyes, and headaches are symptoms often associated with rhinitis. When obtaining the history, ascertain the following: Determine which symptoms are reported by the patient or parent. Ask if symptoms occur in different locations.