Symptoms of vagus nerve excitation can be manifested as circulatory system symptoms, respiratory system symptoms, digestive system symptoms, endocrine system symptoms and so on. 1. Circulatory system symptoms: blood pressure drop, slow heart rate, vasodilatation, arrhythmia, weakening of heart contraction, sweating, pallor, cold limbs and other symptoms may occur. 2. Respiratory symptoms: Vagal excitation may lead to slowing of respiratory rhythm and deepening of respiratory depth. 3. Digestive system symptoms: Vagal excitation will lead to increased peristalsis of the gastrointestinal tract and increased secretion of fluid from the digestive tract, thus promoting digestion. Symptoms such as abdominal pain, bloating, nausea and vomiting may occur. 4. Endocrine system symptoms: vagus nerve excitation will stimulate insulin secretion, triggering hypoglycemia, nausea, anxiety, trembling, palpitations and so on. There may be other manifestations of vagus nerve excitation. It is recommended that patients seek timely medical attention and active treatment.