Hello Friend, Good that you are seeking a help here. Consulting a psychologists is good choices. Difference with Psychologist is, he will help him on the non medicinal treatment plan. Medicine are just one part of any psychic treatments and in parallel he needs to follow certain lifestyle changes, self behavioral therapies, dietary changes, excersise etc to get a complete cure.
There are many solutions for a single problem, but it all about the mindset of the patient to follow it with conviction. Psychology counselling will help in achieving this, there by his back pain issues also can get cure.
Go for it with confidence. Consult a Psychologist directly or online. Feel free to reach out to me online for further assistance.
Health Tips
As I am also an ayurveda wellness coach, such backpain related problems along with anxiety are symptoms of imbalanced air energy or Vata in body. There are massage therapy solutions along with natural medicine available in ayurveda for such problems and you may consider this option as well.