1, the correct use of this product is: first with a wet towel to wipe the neck close to the skin side, and then wear to the neck, so that heat faster. If you do not use this method, it is normal that there is no fever or slow fever. Please do not ask for a refund or a bad review on this basis. Thank you.
2, this product may be hot when the heat you can not stand, feeling hot, this is normal, do not think it is skin allergies, you can not stand to take it off, and then wear it again. The good medicine bitter mouth is good for disease, thank you!