@domokane, There are some existing discussions on the topic that you might want to read through.

--- InfraRed Light for Neuropathy: https://connect.mayoclinic.org/discussion/neuropathy-6/
--- Infrared Sauna Treatment for PN: https://connect.mayoclinic.org/discussion/infrared-sauna-treatment-for-pn/
--- Laser Therapy for Neuropathy: https://connect.mayoclinic.org/discussion/neuropathy-1/

Here's some more information that might be helpful.
--- Mechanisms and applications of the anti-inflammatory effects of photobiomodulation:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5523874/
--- Near-Infrared Light and Heat: Dr. Terry Wahls and Brian Richards from Sauna Space: https://youtu.be/-sSMUPlVINQ