We appreciate you sharing this with us and understand how upsetting this must be, Russell. Please know certain versions of Crest Pro-Health Rinse contain cetylpyridinium chloride (CPC), an ingredient that not only helps to fight plaque and gingivitis but also kills bacteria in the mouth. For a small percentage of people who use the product, after it kills germs in your mouth, those dead germs can collect on the tooth surface and create the appearance of stains. Rest assured the discoloration is reversible and largely preventable. To help remove and prevent the discoloration, we recommend using a tartar-control or whitening toothpaste, a power toothbrush, and floss. Your feedback is truly important to us and will be shared with our team. We'd be happy to help you find a mouthwash that meets your oral care needs. Please call us at (800) 566-7252 so we can assist you further.

Sri, we're so sorry to learn you've experienced swelling and throat pain, and hope your symptoms have improved. Please know, safety is our top priority, and we have many safety checks in place to ensure our products are safe when used as directed. Flavor oils, surfactants/foaming agents, tartar control agents, and abrasives all have some potential to cause irritation. While all of our products are safe and effective, some people may not tolerate a particular formulation. If irritation persists or becomes uncomfortable, please discontinue use and consult with your dentist. So we can learn more and help further, please call us at (800) 285-9139.