I have a 14 year old boy with shingles. Looking for advise on what to do for him?

That's strange at. This age. Please see his doctor asap.
Same plan as adults. I would suggest you have the DX confirmed & at that visit the doc can prescribe meds to suppress the flare up and deal with the pain as needed. The site should be covered as the debris can spread the virus to susceptible persons. I have seen this as young as 15 mo.