... 4-6 hours* Can be used as hot and cold compress* Necessary in the daily life as a good assistant* ... pain, sciatica, vertebral pain, improve mucous membrane scar after surgery5) cold compress: physical therapy for traumatic hemorrhage, heatstroke, itch, headache, strain, ... scald and fatigue6) Medical available for hot or cold compress easily and conveniently, necessary as a first-aid for every ...