Urine leakage in dogs is usually caused by factors such as excitement, nervousness and fear, urinary system diseases, etc. When a dog is emotionally excited, such as seeing his owner coming home, he is too happy and excited, which makes him unable to hold back his urine and causes leakage. When dogs enter a new environment or are frightened, they may become nervous and fearful, and may also suffer from urinary incontinence. Dogs suffering from urinary system diseases can also cause urine leakage. It is recommended to consult a doctor for medication.