During menstruation, it is generally not recommended to do back meridian unblocking, especially the position of the waist, so as not to affect menstruation, fertility and other adverse consequences. During menstruation, the shedding of the endometrium itself will lead to a large amount of menstrual blood flow, from Chinese medicine, blood belongs to the yin, and when qi travels, blood travels, which will inevitably lead to the depletion of qi and blood in the body, and qi and blood consumption will cause the body’s fatigue and weakness (fatigue and weakness). The liver stores blood and the kidneys store essence, and the flow of menstrual blood during menstruation may lead to low mood, lumbar and knee weakness (a feeling of soreness and weakness in the lumbar and knee areas) and other symptoms. Meridian unblocking of the back is usually done when the body’s qi and blood are strong and the evil is strong and the positive qi is not deficient, so that the meridians and tense muscles that are blocked by qi and blood (qi and blood transportation are not smooth and stagnation occurs when they are blocked) can be unblocked and relaxed. Doing back meridian unblocking during menstruation may affect the normal operation of menstrual qi and blood, and exerting too much force may affect fertility and aggravate symptoms such as tiredness (fatigue) and soreness of the waist and knees (a feeling of soreness and weakness in the waist and knees) during menstruation. Therefore, it is not recommended to do meridian dredging on the back during menstruation.