The hardness around the wound after cervical lymph node surgery may be caused by local scarring, muscle adhesion, wound infection and other reasons. 1. Local scarring: it may be a normal phenomenon for patients to have hardness around the wound after surgery, which is usually due to the proliferation of fibrous tissues and thus the formation of scars, if there is no other adverse reaction, no special treatment is needed, and the symptoms will be alleviated with the growth of time. 2. Muscle adhesion: muscle adhesion is usually caused by trauma, surgery, etc. If the wound is damaged externally or medically, it may cause proliferation and atrophy of fibrous tissue and muscle tissue, resulting in the symptoms of hardness around the wound. 3. Wound infection: If the patient has improper postoperative care or bacterial virus invasion, it may cause wound infection, which may lead to the symptoms of hardness around the wound. Hardness around the wound after cervical lymph node surgery may also be due to other reasons, and it is recommended that patients should go to the hospital for relevant examinations before treatment.