hmm ali sounds like something has irritated the skin and caused your furbaby to scratch so hard
have you got any wondering dew in the garden?? A well know culprit!!
or perhaps sandflies from sand??
an oatmeal doggiewash, short hair and a bland diet for a bit such as a chicken and rice diet that is low in inflammatory food should help and the vet should be able to give pup an anti-histimine shot to settle it down and perhaps some a/biotics if they are infected!
good luck and i hope that the visit isnt too expensive!!