If the right foot always cramp, one side of the limbs for a long time cramp common causes are the following aspects: first, the right side of the lower limbs there are acute injury and chronic strain, such as the right side of the muscle strain, contusion, laceration or long-term muscle fatigue strain, will lead to muscle dysfunction, dysfunction, which leads to muscle involuntary spasms, contractions, that is, the right foot is always cramp. Second, lumbar spine diseases, such as lumbar disc herniation, lumbar spine slipped and spinal stenosis compression of the right lower extremity sciatic nerve nerve root, which leads to lower extremity neuromuscular function is prone to disorders or disorders, will be prone to cramping symptoms accordingly. Thirdly, vascular diseases of the lower limbs, such as varicose veins and phlebitis, can lead to poor blood circulation in the muscles of the lower limbs, which can also easily lead to frequent cramps. It is recommended that patients seek medical examination in time, clear diagnosis and active treatment.