I didn't expect it (because during use I didn't feel anything, any effect), but keeping it for 24 hours, the next day I had less pain (in a total of 2 days and 2 uses) I had the desired result. (I consider it helpful because I had tried many things until massage with clay)

I have tried many plasters. These are the only ones with which I saw some difference. In addition, one of their pros is that they stick very well and stay in place

Whether I use it or not, it's all the same. It doesn't provide any relief and, of course, it has a poor quality-price ratio.