Sinuses are cavities in the cranial bones that comprise the nose, cheeks and eyes. These cavities are lined with membranes that normally produce mucus. This mucus is an important substance that warms and moistens air as it is inhaled, as well as filters the air for pathogens and other unwanted substances. However when infection occurs in these cavities, mucus production increases and leads to clogged sinuses accompanied by increased pressure in the head, stuffy nose, pain in the head and face and a decreased sense of smell and taste. The herbs in this collection of products are supportive of the body's natural processes that thin and expel excess mucous.