JuvaLips was designed to prevent bruising and injury, and extensive testing has shown that it’s safe and easy to use. However as with any product used on the human body, individual results may vary. We have tested hundreds of individuals and have seen slight bruising in only a very few of those tested. These people were generally people that were prone to bruising easily, and the bruising typically only lasted a few days. That’s the main reason why we recommend only applying one or two timed treatments the first day, and then wait and see if any discomfort or mild bruising results. Typically a person will become accustomed to the process after the first treatment or two and no further bruising will result.