I think this works on the same principle as this device which heats up a patch that you press to your skin. I’ve also found that it works to heat up a spoon in near boiling water and press it to my skin for a few seconds.
I think this works on the same principle as this device which heats up a patch that you press to your skin. I’ve also found that it works to heat up a spoon in near boiling water and press it to my skin for a few seconds.