"Shivers" are physical reflexes that your body uses to keep you safe and healthy. Shivering may be caused by the cold and your body telling you to warm up. Or it may be caused when you are afraid and need to take action.
There are several reasons for shivering. For one, you may simply feel cold. The body also shivers when its temperature drops, or when it's experiencing feelings of fear, nervousness, and anxiety. A low blood count can also attribute to shivers throughout the body.
Rubing hands creates friction due to which heat is produced and you feel warmth; the same reason your body shivers when you are cold, the extra movement creats heat for your body.
In cold situations, the human body shivers to produce heat and the blood vessels constrict to retain heat, in hot situations the human body sweats to release heat. These are the ways the body thermoregulates.
Dogs get the shivers by a couple of things that include: coming from a freezing cold environment into a warm environment immediately, another way is if your dog is eating any toxic things like for example the waste of an other animal or possibly itself, if your dog is aged it might have the shivers by being close to death, if your dog has an injury at any part of the body then you should get it checked out because it just might be in pain which causes the shivers. There are plenty of other reasons that dogs can have the shivers so I would go to the vet and have them check your dog if it is still having shivers after 2 or more days. Some dogs end up having to just get a needle, and then they will be fine. If your dog still has the shivers after getting a needle then there might be something seriously wrong with your dog.
One home remedy for cold shivers is to drink a warm beverage such as tea or soup to help warm up your body. You can also try taking a warm bath or using a heating pad to help alleviate the shivers. Additionally, make sure to dress in warm layers and keep yourself well hydrated to help combat the chills.
You may have a fever, when your body is fighting an infection of some sort you gets fevers and you feel cold when your temp is going up/increasing.
Shivers or trembles.
When your body shivers to warm up muscles in response to sitting on an iceberg in a swimsuit, this is an example of a homeostatic response known as thermogenesis. The muscle contractions during shivering generate heat as a way to increase body temperature in cold environments.
Can be cold, fear or excitement. My male pit shivers for all of those reasons. Or sometimes if he really needs to go out!
Homeostasis
at the bottom of your if it is cold or warm then it controls body temperature