Facial pressure. The facial pressure in people with dust mites happens because the body interprets dust mites as a foreign threat. This causes an immune response where blood vessels open up to make it easier for white blood cells to attack the microscopic dust mites. The end result of all this immune activity is an increase in inflammation. Though inflammation levels rise throughout the body, they are particularly high around the nose and mouth area where most contact with dust mites is made. This swelling and inflammation makes pressure build up around the face. People with dust mite allergies can feel a sense of tightness and pain in the region.
