Fig 3. Pain intensity change at different time point.
By employing a 3-month moxibustion treatment, menstrual pain intensity and its related symptoms were significantly improved. In the treatment course (the 1st and 2nd month), drug overweighed moxibustion treatment in terms of controlling pain severity, but at the end of the 3-month treatment, the improvement in moxibustion group was not significantly different to the drug control group. Moreover, the effect of moxibustion sustained to 3 months after treatment.