Lumbago during menstruation refers to lower back pain that occurs during the menstrual period and disappears after menstruation.

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1. Blood Deficiencyqi Stagnation︰During menstruation, there is pain in the lower back, distension in the lower abdomen, scanty menstrual flow, and difficulty in flow. The tongue coating is thin and greasy, and the pulse is wiry and thin. The cause is blood deficiency and qi stagnation, leading to muscle and tendon tension. Symptoms include lower back pain, lower abdominal distension and fullness with discomfort, scanty menstrual flow, and difficulty in flow. The treatment should focus on nourishing blood and regulating qi, supplemented by tonifying the kidneys. The prescription is Kuandai Tang minus Ophiopogon Tuber, Lotus Seed, and Desertliving Cistanche, with the addition of Corydalis Tuber, Cyperus, and Liquorice Root.
2. Liver-kidney Depletion︰During menstruation, lumbago is severe as if the back is breaking, which gradually alleviates after bed rest. The menstrual cycle is delayed, with scanty and pale discharge. The tongue is pale with thin white coating, and the pulse is deep, thin, and weak at the chi position. This condition is caused by congenital deficiency of the liver and kidneys or excessive menstrual bleeding leading to deficiency of essence and blood. Symptoms include severe lumbago and scanty, pale menstruation. The treatment should focus on tonifying the liver and kidneys, using the modified Young Maid Pill.

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1. 《Essentials of Clinical Practice in Chinese Medicine》"Lumbar soreness during menstruation is mostly caused by physical weakness and deficiency of the liver and kidney. Add Eucommia Bark and Dipsacus to the classical formula for comprehensive treatment, but do not treat it as the main symptom."