Introduction
Menstrual cramps — also known as dysmenorrhea — are a common problem for many women. They can cause pain in the lower abdomen, back, and thighs, often accompanied by fatigue, nausea, and mood changes.
While painkillers are the most common solution, many people are looking for natural, non-drug alternatives to ease menstrual pain. One emerging option is red light therapy (RLT), also known as photobiomodulation therapy (PBM). But does it really help with period cramps? Let’s explore the science.
How Red Light Therapy Works
Red light therapy uses specific wavelengths of red and near-infrared light (around 630–850 nm) to stimulate cellular energy production. When absorbed by mitochondria in the cells, the light enhances ATP (energy) generation, improves blood circulation, and reduces inflammation and muscle tension.
For menstrual cramps, these biological effects can help:
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Relax uterine muscles, reducing painful contractions.
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Improve pelvic blood flow, easing cramping and discomfort.
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Reduce inflammation in reproductive tissues.
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Balance hormone-related pain responses naturally.
Scientific Research and Evidence
Several studies and clinical observations support the use of red light therapy for menstrual pain relief: