If the leg pain is simple, it is mostly considered to be physiological factors, and there is usually no need to worry about cancer. If the leg pain persists for a long time, it may be related to bone and joint diseases, neurological diseases, vascular diseases, etc. At this time, it is recommended to go to the hospital for medical consultation, to clarify the cause of the disease, and to check whether it is cancer. Cancer is usually caused by hereditary, physical and chemical factors, and there are more factors leading to leg pain, such as physiological factors after strenuous exercise, prolonged standing, excessive fatigue, etc. Leg pain caused by this condition can usually recover on its own after a period of time, so there is no need to worry about it as a manifestation of cancer. Leg pain caused by pathological factors includes a variety of diseases, such as osteoarthritis, including tuberculous arthritis, rheumatoid arthritis, primary bone tumors, etc.; neurological diseases, including intervertebral disc disease, spinal stenosis, etc., which can be caused by neurological pain in the legs; and vascular diseases, including arteriosclerotic occlusive disease and arterial embolism. When there is leg pain caused by disease factors, you should go to the hospital in time for relevant examinations to clarify the cause of the disease, to check whether it is cancer or not, and to treat the symptoms.