Stomach trembling is usually caused by various reasons for stomach cramps, but cardiovascular diseases such as abdominal aortic aneurysm cannot be ruled out. Stomach cramps: If you usually like to eat cold and cold food, or spicy and stimulating food, it may lead to stomach cramps. In addition, excessive stress, long-term mental tension, stomach cold, taking aspirin and other drugs may also lead to stomach cramps, thus producing the feeling of stomach churning. 2. Abdominal aortic aneurysm: Abdominal aortic aneurysm refers to a permanent abnormal dilatation of the abdominal aorta. The abdominal aorta is close to the stomach, and once the aorta expands and enlarges, the throbbing that occurs when blood flows through the artery becomes more pronounced, and this throbbing is transmitted to the abdominal wall, causing the feeling of stomach churning. If you experience stomach churning, it is recommended that you see a doctor for a clear diagnosis and treatment according to the doctor’s instructions.