the reply i got to advertising foot problems was
Hi ya, Your dog will have stung his paws. When puppies are young they have very soft pads and they get irritated by nettles, thistles etc. The symptoms are just as you've described and sometimes with the addition of scratching bedding frantically.
He will grow out of it as his paws harden. The best thing for it is an anti hystermine cream . .. i use benadryl . . . available over the counter. Spread it on thinly and it should work within 10 mins. Others suggest Sudacream or calamine, but personally i found the benadryl by far the best pr