Is the cold sensitivity in my client’s hands and fingers a consequence of cellular memory from that day in his childhood when he suffered frostbite? If so, what can we do to heal it?

This would be a good client issue to target using the Lightworker Healing Protocol that is now coupled with Creator-Directed Trauma Resolution because this is, in effect, a trauma event causing a long-term consequence through a residue of perturbed local bodily function preserving a memory of the trauma, largely within cellular memory, and reproducing it when triggered with exposure to cold temperatures beyond a certain threshold—that will reawaken the cellular memory and it will pile on and recreate the old painful feelings and circulatory impairment to exacerbate it. So focused healing attention will resolve this over time. There are older karmic linkages as well to tragic events in other lives from cold exposure, and that will add to the healing burden needing to be overcome, but it is doable.