·37°C~38°C: close to body temperature, relatively mild, generally recommended not to exceed 30 minutes;
·39°C~40°C: hotter, with a strong soothing and relaxing effect, it is recommended to control within 20 minutes;
·Above 41°C: higher risk, heart rate may increase, skin overheating reaction, not recommended to exceed 10-15 minutes
2025-07-15
