How Can Pain In The Lower Back Be Treated?

I have a 19 yr old son that has scoliosis and recently playing a basket ball game he bent down and another kid landed directly on his lower back it s been 4 days and hes still hurting when he twists, bends ,or turns a certain way. He has had his gall bladder,& appendix removed. He has broken his left ankle once on each side the first time he shattered the bone the second was a smooth break he also used to take 21 mg concerta for his ADHD but has gotten himself off the medication, my question is should I worry about this maybe being an illness as to injury and what do u recommend we do about his back he s in pain mostly in the evenings