When applying hot compresses for sciatica, you need to choose the location of the hot compress according to the specific causes of sciatica. First, if the lumbar disc herniation, lumbar spinal canal and nerve root canal stenosis, usually carry out lumbar hot compress, generally in the lumbar side of the open 0.5-1 inch position, through hot compress can effectively increase blood circulation, promote the absorption of inflammatory metabolites, effectively reduce the inflammation between the intervertebral disc and the surrounding hyperplastic tissue and nerve root, reduce inflammatory edema, and promote recovery; Second, can be carried out Hot compress the position of the pear-shaped muscle, the pear-shaped muscle in the back side of the hip, due to the pear-shaped muscle strain, edema and adhesion formation, will produce extrusion and stimulation of the sciatic nerve penetrating inside, sciatica, through hot compress, can effectively increase blood circulation, reduce the inflammatory edema of the sciatic nerve, significantly reduce symptoms.