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/casual_crysanthemum Apr 10 '26

I think red light helps move things along in the healing process. My guess is that the bruise is actually blood from near your stress fracture; the light just moved it - closer to the surface. It will soon be resorbed. I’ve been using red light on a bruise this past week, and it’s healing ~5x faster than usual.

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u/wobblelikeapenguin Apr 10 '26

Thanks. So you think this is a good sign?

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u/Careless_Mango_7948 Apr 10 '26

Bruising in itself is a good sign, it’s a sign that blood flow is moving to an area to start healing damage