It really depends. If most of your car is in factory paint, and the areas that are bubbling has been in repainted before (i.e. the front clip of your car). You might be able to just spot in the bad areas, then reclear the panel(s). If the whole front clip had been previously repainted, I would reclear the complete front end, but not necessarily redo all the green, just the bad areas.
This new clear should 'hold' down any bad clear that has not yet started lifting.
You will definitely need to sand down past the clear in the bad areas, then reprime, spot in the green, then reclear the complete panel(s). This will either fix it, or it will be a temporary fix.
If the comlete car has been repainted before, then most likely the bubbling will happen elsewhere. If this is the case, you should take all the paint off, reprime, then repaint.