Try asking a vet. It may just be a behavior issue, so there would be nothing wrong in that case.
maybe because it is scared or it did not go outside but i do not know for sure
If your dog is an outside dog and the dog itself is that cold then you need to warm him/her up. If it is an inside dog and it is just cold outside, then your dog will normally try and hurry up so it can return to the indoors.
The basic answer to that is yes they need to come inside. BUT, it depends on your breed of dog, its age, if the dog has cover outside, dog house, shed, under the porch, or maybe even under the house. For the most part just bring it inside.
Is when a dog needs to go to the bathroom outside, not inside
You need a dog house if your dog lives outside but they don't need one if they live inside but you can have one if they live inside.
Meaning besides having a dog, a book is a good thing to have. Just the play on the words inside and outside make it funny to think of it as written. I like this quote, had been told it was Mark Twain, it is Groucho Marx.
play with the dog more and dont leave the dog alone but dont get in the dogs face too much Alexis nieves,11
Inside or outside dog?.... please ask in a more complete sentence.
This means that your dog wants to be with you. Either spend more time outside with your dog playing with it, or think about letting it come inside with you. Or consider getting another dog to keep the first's attention and so it can have someone to play with.
Because he wants to come inside...
Well it is about the same. However it depends on your preference. I personally keep my dog inside. However I think that most people do prefer to keep their dog outside.
by putting the dog on a tredmill or just go outside anyways
well let your dog cool off then if the dog wants let her outside