Painful symptoms in the skin and superficial tissues of the legs are commonly caused by the following: 1. local sensory nerves become painfully allergic, commonly including cold, poor blood circulation, local trauma, etc., which can lead to nerve dysfunction and thus produce painful allergy. When lightly touched, it will produce obvious discomfort and pain; 2, seen in local injury, such as injury directly caused by local sensory nerve injury, will lead to local pain symptoms; 3, seen in neuritis, etc., due to the presence of inflammation of the nerve, will appear corresponding pain allergy; 4, other factors, including lumbar disc herniation, pear-shaped muscle syndrome, will lead to lower limb The sciatic nerve is compressed and irritated, and the corresponding skin sensation of the lower extremity will also show painful symptoms.