Red light therapy after surgery
Clinic light on an incision has trials behind it. A home device after foot surgery has none yet.
Short answer: in the days after an operation, red or near-infrared light from a clinic device helped incisions heal and eased pain across dozens of small trials — but the researchers who pooled them rate their own certainty as very low, because the trials differ so much. For long-standing wounds the picture splits: some help for shallow diabetic foot ulcers, none shown for venous leg ulcers, and too little to say for bedsores.
Nobody has tested light therapy after foot or ankle surgery, and nobody has tested a home device on a surgical wound. If a device helped you, that is real to you — it just isn’t yet something a trial has measured.
How the evidence flows
Each claim (middle), the studies that tested it (left) — green found it, red found nothing — and the grade they add up to (right). Drawn from the same records as the grades below. Tap to open full size.
What the trials actually did
The surgical trials used calibrated clinic devices, mostly near-infrared (700–850 nm worked best in the pooled analysis), for 4–10 sessions in the first days after surgery, applied by staff at a set distance and dose. A home panel or wand may use similar wavelengths, but unless it states its wavelength and power you cannot tell whether it delivers anything like those doses.
Before you use a device on a healing incision
- Ask your surgeon first — about timing, and whether the incision should be covered.
- Don’t use light on a wound that looks infected — redness spreading, warmth, pus or fever mean call your surgeon.
- Check the label for wavelength (nm) and power (mW), and the FDA database for a clearance under the product’s own name.
- Never shine bright light into eyes.
Related: does red light therapy work? · every claim on the body map