... the treatment more effective 3.It can adapt unlimited time heat cold packsProduct details 1. This product is made up of high ... hot use after pre-cooling or pre-heating treatments.Indications:Cold compress:headache, fever, toothache, sunstroke, scald, muscle scuffing, sprain, ... vertebra trouble, sciatica, and strain of lumbar muscles etc.Usage:Cold compress: Use after put in the icebox or freezing box ...