My Husband Has A Straight Spine...a Chiropractor Told Him That

My husband has a straight spine...a chiropractor told him that his spine doesn't curve at the neck, where normal it should curve ( to hold the head up)...and he woke up a month ago with severe shoulder pain, and now his arm and fingers tingle/numb. He is a tough MILITARY man and NEVER COMPLAINs AND NOW I know he is telling me it is killing him....which means HE IS IN PAIN BIGTIME!!! Is the only thing a person born like this, to simply use PAIN MANAGING for such a problem? Acupuncture, Epidural shots, or WHAT WOULD YOU SUGGEST?