The following situations can be used in conjunction with the gel
Feeling too strong when using the massager;
Sensitive constitution, acupuncture sensation is obvious when using the massager ;
It is not obvious when using the massager or the first time use it.
Allergic to metal electrodes;
Dry skin in autumn and winter and discomfort during the massage;
Poor fit due to improper wearing;
Sensitive discomfort with a heat compress.
P.S. We suggest you tab your neck with a wet and warm towel or lotion before every use if you do not have the gel with you;