The flesh on the body feels as if it is thick for almost 18 days after breast cancer surgery, which usually refers to the soft tissue thickening after breast cancer surgery. Soft tissue thickening after breast cancer surgery is generally a normal phenomenon, which can be alleviated by promoting local blood circulation through hot compresses. Soft tissue thickening usually refers to cell proliferation and edema caused by inflammation, trauma and other stimuli. If it is stimulated by inflammation, anti-infection treatment can be used under doctor’s guidance, and after symptomatic treatment, the proliferated tissues may become thinner or no longer thicken. In addition to soft tissue thickening after breast cancer surgery, patients should also pay close attention to the symptomatic changes after receiving treatment and record them, so that doctors can adjust the treatment plan in time; it is found that patients with underarm lumps, local pain, lethargy, and fatigue are not improved and need to be treated promptly with symptomatic treatment.