In nonetheless other patients, airborne or contact allergens like pollen and animal dander can produce the characteristic red swellings. Insect stings, such because those of bees and wasps, as a rule product breathing difficulty for those sensitive to the venom. Nonetheless hives are far from unknown in this case, ever since well. "A diminutive number of dust, for example, may leave an otherwise sensitive person unaffected. Conversely, over time, because more dust mites carried on the particles enter the nasal cavities and sit in the sinuses, they release more and more material. The eventual result can be the familiar rhinitis or runny nose associated with that particular allergy."