A dog that barks at the touch of any pain may be caused by trauma, joint pain, nerve pain, or a conditioned reflex caused by being too timid and fearful. It is best to take the dog to the pet hospital for examination first. Confirm whether the dog is healthy to avoid delaying the condition. If there is no abnormality in the body, it is caused by psychological reasons. The owner needs to accompany the dog more to comfort the dog and eliminate the dog's tension.