What can my husband do for his chronic low back pain?

On my husbands MRI it said Large Herniated Disk( L4). All the doctor has done for him is give him pain killers. There has to be something eles he can do . The doctor also said he is to young for back surgery so all he has done is write him pain pills every month there after. There has to be something eles besides having to take pills for the rest of his life. I really hate feeling so helpless. When he is in pain its chronic. It really hurts me because I cant take the pain away. I would give him my back in a second. Thanks to anyone who can give some helping words.