My LLLT was for chronic RSI/TOS/myofascial pain, by a very good chiro.
He also used it for my plantar fasciitis, elbow, shoulder, neck, low back...

My concussion was 45 yrs ago, luckily it resolved, but I do think some of my neck issues in middle age were a partial factor of that long ago injury.
That's why I often suggest getting upper cervical & treatment for neck muscles for members here.