No, you just feel that subcutaneous fat will burn, as if it were burning. If it's burning blisters, there is something wrong with the products you use. You can contact relevant departments to defend your rights. I have used burning grease before, and it will be wrapped in plastic wrap after application, which will have a burning feeling and be very painful. . Generally 15-25 minutes is enough, and it won't take long. Rinse it clean.