@altabiznet Hi. The following information has just been my experience. I have used Red/Near Infrared for a long while, and I have felt its benefits as it penetrates deeply to reduce inflammation targeting both joints and muscles to help relieve chronic pain & arthritis. There are benefits to Red Light Therapy but is more on the surface level. Near Infrared penetrates deeper, so is better for chronic pain and circulation/blood flow leading to improvement in joint stiffness. Natural therapies are not a one and done though. I have a functional/integrative/naturopathic doctor and trusted health food store with a well-trained and knowledgeable owner to recommend natural supplements, labs, etc. Essential oil tinctures (takes a bit of learning), tuning forks, ultrasound therapies, acupuncture, stretches and exercise (keep moving), D3/sunshine, proper sleep & rest as needed, diet/nutrition (***avoiding inflammatory foods), PEMF (pulse electromagnetic field therapy), occasional PT....keeping stress levels low. At the risk of sounding cliche, I had a live cell analysis done for gut health check, and you will find that getting your gut/digestive issues healed...it will improve your overall health. I cannot stress this point enough. I wish I had done this sooner. So many of your PI or PID (Primary Immunodeficiencies) & AI (Autoimmune Diseases) diseases/disorders symptoms will significantly improve. Speaking of which, understanding the difference in PI & AI is essential (one is an underactive immune system and the other is when the immune system attacks its own healthy cells. Even if you do not have access to testing for gut health, I would recommend that you research or speak to a well-informed specialists (natural) about what you can to do heal your gut. Unfortunately, it is up to you to be your own advocate and learn all you can about what therapies, diet, supplements are most beneficial. Build your network of people who know more than you.... Start by trying to understand more about your conditions/disorders and perhaps what may have contributed to the disorder/disease. It takes time and energy, and I have been at this for several years...I have not arrived nor will I ever. There are so many other therapies I want to try in the near future. Reducing inflammation in the body is key. Again, all of this has just been my experience and I am a novice who tries to learn all she can. It can be overwhelming, so take small steps toward improved health...I would definitely start by first learning about diet and nutrition for lowering inflammation. So a synopsis would be: I have used many modalities and therapies including red and near infrared light, and my inflammation and immune activity markers have improved so much. On the TECAR, I have tried similar therapy involving high frequency energy and heat as post injuries/surgeries recovery to improve circulation and range of motion as well as to reduce pain. I believe it was beneficial. I do not remember it being called TECAR therapy. I am by no means an expert on natural remedies, and there is a place for both conventional and natural medicine. The best to you.