Is the optical quantum therapeutic instrument useful?

I think light quantum can at least promote blood circulation, open channels and collaterals, make blood circulation and make people healthier. We still have to investigate the cure and treatment, but I don't want to say what diseases we can treat. I think so, because there are many quantum therapeutic devices on the market now, such as "Xiao Yu Jian Sheng Low Frequency Quantum Therapeutic Device", which everyone is familiar with and has a lot of contact with, and others can't remember their names. ..