Standing for a long time the common causes of back pain are as follows: 1, after standing for a long time, pain in the lower back, may be lumbar muscle strain. Lumbar muscle strain is mostly due to the patient’s frequent strenuous activities, or frequent lumbar exertion or improper force and lumbar soreness, and accompanied by pain. You should rest or sleep on a flat bed, as well as use some topical ointment, such as blood circulation and pain relief ointment, to relieve the pain in the area of lumbar pain. If the pain is very obvious, you can also take oral painkillers, such as celecoxib. 2, at the same time may also be caused by lumbar disc herniation, disc herniation if the two sides can be compressed spinal nerve root and the corresponding symptoms, the patient is mainly manifested in the lumbar pain, and may be radiated like the buttocks and the lower limbs, you can line intervertebral disc CT or intervertebral disc magnetic disk for diagnosis, diagnosis is clear, after the early conservative treatment. After the diagnosis is clear, the early treatment is conservative, sleeping on a flat bed, resting more and avoiding lumbar activities as much as possible, if the patient’s pain is very obvious, minimally invasive surgery can also be considered.