Standing often is not very good for the human body, so it is not advisable. Standing for a long time may lead to varicose veins, lumbar strain and so on. 1. Varicose veins: Some special occupational groups are good at standing for a long time, such as teachers, standing for a long time, cashiers and so on. Standing for a long period of time puts the leg muscles in a tense state, which leads to slowing down of blood flow in the lower limbs, increased pressure on the walls of the venous blood vessels and the valves of the veins, which in turn leads to incomplete closure of the valves, resulting in varicose veins. 2. Lumbar muscle strain: standing for a long time will aggravate the burden on the lumbar muscles, so that the pressure of the lumbar intervertebral space increases, for patients with lumbar intervertebral disc herniation, it is easy to cause nerve compression and aggravate the condition. In daily life, you need to change and adjust different postures such as lying down, sitting, standing and walking, so that the joints and muscles of the human body can be moved or relaxed, and avoid the single posture leading to muscle and bone damage.