How should I deal with any old stuff which surfaces during or after the spiritual healing session?
That is your choice. I ask you to try being with the “stuff”, if any, in a loving and allowing way, without judging, attacking, or criticizing, and with compassion and love. My experience, and that of many others, is that when we stay with these feelings and memories in a loving way, without running off into a thousand thoughts or mental pictures, they shift and transmute, or dissolve.