Your dog has a tooth infection in the tooth that is discolored, and is probably in a lot of pain right now.
My first suggestion is that you go to the vet immediately. Sometimes vets are fine with taking a post dated check, especially where the problem needs immediate treatment. If your doctor is not willing to do so, then bring the dog home, and go back to the vet if one of the following symptoms is there: Grinding of the teeth, whining, the dog can't eat/close it's mouth, or bleeding.
In the meantime, you can give your dog aspirin. Aspirin can be toxic if there's an overdose, so make sure you only give 5-10 mg per pound of your dog. Also, make sure the pill has a powdery coating, as your dogs stomach cannot digest the candy like coating. Also, do not give it for more than 10 days.
You can replace Aspirin with Tylenol, but do not give your dog Motrin, it can be fatal for him.
My first suggestion is that you go to the vet immediately. Sometimes vets are fine with taking a post dated check, especially where the problem needs immediate treatment. If your doctor is not willing to do so, then bring the dog home, and go back to the vet if one of the following symptoms is there: Grinding of the teeth, whining, the dog can't eat/close it's mouth, or bleeding.
In the meantime, you can give your dog aspirin. Aspirin can be toxic if there's an overdose, so make sure you only give 5-10 mg per pound of your dog. Also, make sure the pill has a powdery coating, as your dogs stomach cannot digest the candy like coating. Also, do not give it for more than 10 days.
You can replace Aspirin with Tylenol, but do not give your dog Motrin, it can be fatal for him.