There are two main reasons why smoking can cause hiccups: 1. The harmful substances present in tobacco, such as nicotine and tar, can stimulate the diaphragm, causing spasm in the diaphragm and the phenomenon of smoking hiccups. 2. Related to underlying diseases of the digestive system, smoking can stimulate gastric acid secretion and damage the gastric mucosa, and if suffering from reflux esophagitis, gastritis, gastric ulcer, or duodenal bulb ulcer disease Smoking may induce aggravation of the symptoms of these diseases, stimulate the diaphragm to cause spasm of the diaphragm, and the phenomenon of hiccups may occur. The phenomenon of smoking and hiccups should pay attention to diet, eat a light, easy-to-digest diet, eat more fresh vegetables and fruits rich in vitamin C, do not eat cold, spicy and stimulating food, and quit smoking and drinking. It is recommended to go to the gastroenterology department for gastroscopy and Helicobacter pylori testing as prescribed by the doctor for a clear diagnosis and timely treatment.