The pain in the back of the right foot may be due to the following reasons: first, lumbar disc herniation, when the lumbar disc herniation compresses the nerve roots, there can be radioactive pain in the back of the foot, then the CT and MRI of the lumbar spine should be performed for diagnosis and treatment. Second, lumbar spinal stenosis, when the lumbar spinal stenosis, the protruding disc and the proliferating bone spur can also compress the nerve root, resulting in radioactive pain in the back of the foot. Third, pear-shaped muscle syndrome, pear-shaped muscle syndrome can also be serious compression of the sciatic nerve and lead to dorsal foot pain, then the relevant physical examination and the relevant electromyography examination for diagnosis and treatment. Fourth, peripheral nerve compression, such as compression of the common peroneal nerve in its travel, will appear dorsal foot pain, numbness symptoms, then the relevant examination and electromyography for diagnosis and treatment. Fifth, gout, when gout can also appear in the back of the foot pain, often the back of the foot pain at the base of the big toe, then it can be accompanied by local redness and swelling, serious gout stone formation, then the blood uric acid test for diagnosis and treatment.