Applicationmethod: 1.wrestthemetalplateuntiltheinnerliquidbecomeslens. 2.kneadthebaguntilitissoft. 3.putthebagonthebody. Reusemethod: 1.cookwaterinboiler,andputapieceofclothonthebottomoftheboiler. 2.untilthelensmelted. 3.makesurethelenshasbeenmeltedcompleted,andthetherapybagistransparent. 4.takeoutthetherapybagandputitonclothuntilitiscool. 5.whenitiscool,itcanbereused. Caution: 1.cannotbeheatedinthemicrowavewovendirectly. 2.shouldbecautiousiftheskinissensitive. 3.littlechildrencanusethisproductunderparents`supervision. 4.onlyforexternaluse.Ifthepackingisdamagedandtheeyesandskingettouchwiththeinnerliquid,washwithcleanwater.