hi i had gone through your query and understand your concerns. i would come up with the possibility of SCIATICA
due to DISC PROLAPSE
is the cause for his sufferings.
i would suggest you you taking Homeopathic
medicines gives safe and permanent cure for his sciatica with disc prolapse complaints without any surgery.
consult your local homeopathic physician for correct diagnosis of the case and remedy to fit your son complaints
I hope this is helpful for you, thank you