Heat therapy for incisional hardness should mean the use of heat therapy, a form of physical therapy, to promote the dissipation of incisional hardness. Incision nodules are a manifestation of local granulation tissue proliferation and local scar formation after surgery. Local heat therapy can accelerate the blood circulation of the skin and subcutaneous tissue, promote tissue metabolism, reduce the stiffness of soft tissue and joints, reduce pain, relieve muscle spasms, reduce local inflammation and edema, and contribute to the loosening and dissipation of local scar tissue, which is conducive to the healing of incisional hardness. The dissipation of postoperative incisional hardness requires a long process and should not be rushed. Normally, we should supplement vitamins and high-quality protein, and avoid eating spicy and stimulating food. Pay more attention to observation in the process of heat therapy, and strictly master the technical specifications of heat therapy to avoid accidental burns.