My hound has the same problems. Mattie (my hound) would scratch and dig and cry and moan. The vet noticed that she was red spotty on her belly and I told her about the scratching and digging problem and I don't really know what the problem is, she did give me a anti-bodi that I can give to Mattie when she has the flare ups. Which seems to work. I used the medicated shampoo, i used the oatmeal shampoo to help cool her skin, did not help not until vet gave me anti-bodi. It seems to me and my husband that Mattie has flare ups when she crawls across the grass. I don't know if that helps but I feel your pain with the stratching.