It's important to know that Red Light Therapy, aka; photobiomodulation, has a long list of positive studies from credible sources. The issue is that there are a lot of shucksters out there selling cheaply made devices that don't work or may only work a little. I would not give up on red light therapy. Try either a reputable clinic or purchasing a device from a company that stands behind the product with a guarantee, and includes thorough support for using the device.