Thank you for your question! It is not common to gain weight after CoolSculpting treatment. Sometimes the appearance of 'Gaining weight,' after a CoolSculpting treatment is confused with the body's inflammatory responses to healing which include swelling and water retention. If your concerns persist, I highly recommend contacting the original specialist that treated you for a proper follow up and evaluation. The good news is that these side effects typically will go away and are only temporary. Some patients find using a compress for a couple of days prior to treatment is helpful for this. Again, best to check with your specialist to determine if it would be beneficial for you personally. For more information regarding your question, please see the video below. Good luck to you!