The difference between cancer low back pain and general low back pain mainly lies in the cause and the manifestation of pain. 1. Causes Cancer low back pain is usually caused by bone metastasis of bone tumors or tumors in other parts of the body that have progressed to a certain degree. On the other hand, common low back pain is caused by lumbar muscle strain, exertion during pregnancy or puerperium, lumbar spine degeneration, trauma and so on. 2. Pain manifestations (1) Pain level: Ordinary low back pain is often characterized by soreness and distension, which can be gradually alleviated after rest, hot compress and massage. On the other hand, cancer lumbago is caused by metastasis, myeloma or tumors in the lumbar region, which is usually more intense and cannot be relieved by hot compresses and other treatments; (2) The nature of pain: ordinary low back pain is mostly localized pain, occasionally due to lumbar intervertebral disc herniation compressing the nerves, there may be radiating pain in the legs. On the other hand, cancer lumbago will have nerve pain, indirect pain or dull pain, etc., but the site is more fixed. However, if the organ tumor triggers low back pain, there may be symptoms of other related organs; if it is metastatic tumor or myeloma, the patient may also be accompanied by fever, anemia and so on; (3) The time of attack: ordinary low back pain usually appears or aggravates after heavy physical labor, sprain, prolonged bending or sustained weight-bearing of the waist in a short period of time, etc., and it can be improved in a short period of time after resting. Cancer low back pain, on the other hand, is an unstoppable and persistent aggravation, usually unrelated to activity, and tends to flare up after nightfall. However, these symptoms have individual variability in pain perception. For those who cannot completely rule out cancer-induced low back pain and generalized low back pain, imaging tests such as MRI and CT should be performed to clarify whether there is a localized lesion so as to rule out cancer in order to provide a basis for subsequent treatment.