After a lumbar flash, baking can be performed, but it is important to choose the right time for baking. When the waist flash within 48 hours is not suitable for baking electricity, because the waist flash within 48 hours, swelling and exudation is more obvious. At this time the baking treatment will increase the degree of swelling and will also increase the exudation in the soft tissue. So 48 hours later can do bake electricity treatment, at this time the exudation has basically stopped, bake electricity treatment helps the soft tissue recovery and the absorption of exudation. Therefore, it is best to perform bake therapy 48 hours after the back flash.