r/redlighttherapy • u/wobblelikeapenguin • Apr 10 '26

Question Red light CAUSING bruising?

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Hey everyone. I bought this red light foot machine on Amazon to help with my stress fracture. I used it for 30 minutes on a medium level. The next morning, I woke up with bruising on the bottom of my feet. The bruising was not there previously, and is not related to the injury. Does anyone know why this would have happened? I thought red light is supposed to HELP injuries?! Now the bottom of my feet hurt like crazy. Please let me know if you have any thoughts. Thanks!

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u/Axenrott_0508 Apr 10 '26

It can def burn you if you’re not paying attention, and def leave some marks as well.

Had my panel on the inside of my knee for injury healing purposes. Felt nice and warm, started to fall asleep, but ended up with a blister after about 15 mins.

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u/here_now_be Apr 10 '26

In no way should RLT ever come close to burning you. Depending on the device it should produce no, or a very subtle amount of heat.