The use of hot compress treatment at the early stage of fracture will not make the bone scab grow too fast, while in the recovery period, hot compress treatment will promote the growth of bone scab to a certain extent, the details are as follows: First, the patient at the early stage of fracture will have serious local swelling, deformity, after manipulation or cut and reset to ensure that the fracture end of the stability of the patient at this time can not be used to treat the hot compresses, if the use of hot compresses, it will aggravate the swelling, affecting the local If hot compresses are used, it will aggravate the swelling and affect the local blood supply, which is not conducive to the formation of bone scab. Secondly, after 72 hours, the local swelling is stabilized, hot compress treatment can be used to promote the swelling to subside and restore the blood supply, and the increase of blood supply will make the bone scab grow rapidly, which is conducive to promoting the healing of the fracture. Therefore, the hot compress treatment time should be put in 72 hours after the fracture occurs, in order to play the role of promoting the growth of bone scab, otherwise not only will not promote the growth of bone scab, on the contrary, it will inhibit the growth of bone scab.