Objective To observe the effects of line-needling method combined with distal acupoint selection on the temperature of waist and lower limb circulation in patients with Taiyang meridian type lumbar disc herniation(LDH)using infrared thermal imaging.Methods A total of 54 subjects were included,including 34 patients with Taiyang meridian type LDH and 20 healthy subjects.The patients were treated with lumbar line-needling method and distal acupuncture,leaving the needle for 30 min,once every other day,3 times a week for 4 weeks.Healthy subjects were not treated.The infrared thermal imaging of the waist and lower limbs of healthy subjects and patients before and after treatment was collected,and 4 areas(affected lumbar muscle area,thigh posterior side,popliteal cavity and calf posterior side)through which the meridians ran were selected to measure and record the body surface temperature.The difference of circulating temperature between healthy subjects and patients before and after treatment was compared and analyzed.The simplified McGill Pain Scale(SF-MPQ)score and Oswestry Disability Index(ODI)score were compared before and after treatment,and the clinical efficacy was evaluated.Results LDH patients with Taiyang meridian type had abnormal temperature along the meridian in the waist and lower limbs.Compared with healthy subjects,abnormal low-temperature areas could be seen in the meridian areas of the waist and lower limbs(P<0.05).After treatment,the temperature in the meridian area increased,and the SF-MPQ score and ODI score significantly decreased(P<0.05),with a total effective rate of 97.06%(33/34).Conclusion The combination of line-needling method and distal acupoint selection can significantly improve the clinical symptoms of LDH patients with Taiyang meridian type,and has a significant adjustment effect on the changes of lumbar and lower limb meridian temperature.