My son who is 15 years old , fell on his back hard on astro turf whilst playing football last night. He did not hit his head but his back hurts a bit , he is still walking around. I have given him painkillers 20 minutes ago.  Shall I take him to hospital to get X-ray?
If there was hurt on his back, he should do X-ray to exclude and spinal disorders. If the x-ray is free, this will be muscle spasm due to trauma and treated by analgesics and anti-inflammatory tablets.