Cooling patches utilize the principle of heat absorption through water evaporation in the gel and cold storage through phase change materials to continuously and stably remove heat from the body surface, achieving rapid localized cooling.
This effect is not only suitable for the burning sensation caused by muscle overheating after exercise but is also commonly used as a physical aid for cooling patients with high fever. Applying them to areas such as the forehead, neck where large blood vessels pass, or armpits helps dissipate excess body heat and prevents high temperatures from damaging cells. Compared to traditional ice packs, cooling patches have a larger contact area, gentler temperature control, and are less likely to cause frostbite, making them suitable for prolonged continuous use to maintain a low-temperature environment.