Please be sure to read the precautions. You may feel bulge while using it, but the liquid content is not leaked. If you experience any abnormalities on your skin, stop using it immediately and consult a physician. ● Does not contain harmful substances or carcinogenic substances that are harmful to the human body, but if the pack breaks and adheres to your body, rinse thoroughly with soap and water or lukewarm water. If it gets into your eyes, please rinse it off with water. In the event that accidentally swallowed, immediately take 3-4 cups of fresh water and consult a doctor. When opened, there may be a slight liquid substance on the surface to protect the product, but the product itself does not affect it, so please wipe it off or rinse it off before use. If the surface of the pack breaks during use, please stop using it immediately. Do not leave it in places where room temperature is above 104°F (40°C) or in places exposed to direct sunlight. It may cause abnormalities in the contents or leakage. When not in use, please store in the refrigerator or freezer. Please do not use scissors or cutters to cut or separate PCM packs. Please do not leave it near children and animals, as this may cause accidental swallowing. Please be sure to follow the instructions specified by the manufacturer. The PCM solidifies at less than 14 degrees, but there may be slight differences depending on the storage method and how it is used.