What does it mean when a dog rolls on the ground?

The dog rolls what means 1, the dog rolls on the ground, generally the dog is in a state of excitement, through this way to express their happiness and joy. 2, the dog through rolling to attract the attention of the master, want the master to touch its belly, want to play with the master. This is also a sign that the dog is very trusting of the owner. 3, there is another possibility that the dog’s abdominal pain causes it to keep rolling, this situation is usually accompanied by the dog not eating, no spirit, because of pain and howling and other symptoms. It is recommended that the owner promptly take the dog to the hospital for examination.