What is the reason for the dog to bark at night

The causes of dogs barking at night include non-disease causes and disease causes, where non-disease causes mainly refer to dogs stimulated by sound, light and other abnormal factors at night, or dogs have certain complaints, such as the desire to urinate and defecate. Disease causes mainly consider physical pain, such as gastrointestinal colic, joint pain, etc., when the need for timely medical attention. If the dog wants to urinate and defecate and old barking, then after lifting, the dog will not bark again, and at the same time because of this reason the frequency of the dog old barking at night is very low, mostly incidental.