Our Herbal Spray Cleansing Lung contain propylene glycol, witch hazel extract and nasturtium extract. It can remove waste from the lungs, stay in the lungs for more than two hours after inhalation, dilute mucus and remove dirt, and expel sputum from the body, effectively purifying and nourishing the lungs. The way to use it is very simple: clean your nose and hands before use, then put the nose ring on your nose, then clamp it in the proper position, then breathe normally, remove it after 15 minutes, and wipe your nose secretions with a tissue. Effectively improve cough, shortness of breath, sputum, chest pain, dyspnea and other symptoms.