Doesn't sound normal, maybe someone can help talk about it but I think you need to have your dog checked by a veterinarian.
Most likely swollen lymph nodes which could be a sign of some infection. It could also be puppy strangles and there is an off chance it could be Lymphoma.
Thus really warrants a visit to your Vet to determine the cause,mud you haven't done so by now.
Please do come back and update and good luck.