Being overly warm will cause your dog to pant in order to cool down. Typically, if your dog’s panting does not subside, you will want to do a thorough examination of your dog. Feel your dog’s groin and if it feels hot to the touch, your dog is overheated, either from heatstroke or a fever. Check your dog’s mouth, tongue and gums, they should be a pink color. A very pale pink or white color or a bluish purple to the tongue and gums means that there could be a serious health issue. You will need to seek emergency veterinary care.
Allergic reactions or poisonings will need immediate veterinary care. Allergic reactions could be from insect stings, food or an environmental cause. Poisonings could be intentional or unintentional and can come from food, chemicals or plants. If you see your dog eating something unusual, try to get a sample to take with you to the veterinary clinic.
Other possible causes that may not require an emergency visit to a veterinary clinic but will require veterinary care include heartworms, anemia or infection.
In most cases where your dog is overstimulated from nervousness, fear or excitability, you can speak with your veterinarian about different ways to calm your dog. Some veterinarians will recommend natural ways to calm your dog’s nervousness or fear. Seeking the advice of a qualified dog trainer could also help your dog.