Photizo Sinus stimulates the local immune system in order for the body to fight the infection when present, and stimulates the blood flow to the mucus membranes, resulting in the healing of the membranes. When the membranes are healed, normal mucus production resumes. Read more here about Photizo Sinus https://www.photizo.net/za/wp-content/uploads/2018/02/Photizo-Sinus.pdf.