Pain caused by the pull of the tumor on the peripheral membrane of the organs. With the shedding and necrosis of the tumor, the pull of the tumor on the surrounding tissues is greatly reduced or even eliminated, and the pain caused by the compression of the tumor on the peripheral nerves is also greatly relieved until eliminated. Then what causes tumor pulling? The following is to introduce it to you. 1, cancer-related factors: cancer can cause pain in various ways, pain caused by direct infiltration of the tumor, the most common cause is bone metastasis, compression of nerves or infiltration destroying nerves. Pain caused by treatment: Pain caused by anti-cancer treatment mainly comes from three aspects: surgical treatment, chemotherapy and radiotherapy. In addition, some inspection means taken in diagnosing cancer can also cause certain degree of pain, such as lumbar puncture for cerebrospinal fluid, blood specimen, angiography, endoscopy and tissue biopsy, etc., which are mainly caused by primary injury, inflammation or reflex activity. In addition, radiotherapy and chemotherapy suppress the immune system, making patients susceptible to viral, bacterial and fungal infections causing pain, such as shingles and chickenpox. 3. Non-cancer related comorbidities, pain can be caused by concurrent benign pain, which can be exacerbated by anti-cancer treatment or cancer progression, such as disc prolapse, osteophytes, osteoarthritis, rheumatism, rheumatoid rheumatism, and migraine headache. Cancer treatment emphasizes early diagnosis and early treatment. The control of accompanying pain should not be neglected while actively eradicating the disease, especially when the cancer cannot be cured and pain has become the main pain, cancer pain should be actively treated to alleviate the pain of the patients, maintain the personality of the cancer patients and improve the quality of life of the cancer patients.