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Objective: To determine the location of Yaotong point and the optimal time of its needling in the treatment of acute lumbar sprain. Method: Thirty-five cases of acute lumbar sprain were retrospectively analyzed for the location of Yaotong point and the method of its needling according to their disease courses and effects. Results: The optimal time of needling is 1-3 days after lumbar sprain, and the location of Yaotong points on both hands correspond to the location of sprain. Conclusion: This correspondence is useful in practice.