What causes the stomach to be sensitive or averse to eating sour foods?

　　Avoiding acidic foods may indicate conditions such as gastritis, peptic ulcer, or gastroesophageal reflux disease (GERD), which require targeted treatment. Detailed analysis is as follows:

　　1. Gastritis

　　Prolonged irregular eating habits can lead to gastritis, whose main symptoms include upper abdominal pain and nausea. At this time, gastric juice secretion becomes unbalanced, resulting in increased gastric acid production that damages the gastrointestinal mucosa. Therefore, sensitivity to acidic foods may be related to gastritis. Treatment under a doctor's guidance may include medications such as clarithromycin capsules and domperidone tablets.

　　2. Peptic Ulcer

　　Long-term smoking and alcohol consumption can disrupt the gastrointestinal environment, making peptic ulcers more likely. When patients with peptic ulcers consume acidic substances, increased gastric acid secretion may trigger pain. Thus, intolerance to acidic foods may be associated with peptic ulcers. Under medical supervision, medications such as omeprazole enteric-coated capsules and compound bismuth aluminate granules can be used for treatment.

　　3. Gastroesophageal Reflux Disease (GERD)

　　Excessive obesity may cause gastroesophageal reflux, leading to increased gastric acid secretion. Patients often experience classic symptoms such as heartburn or regurgitation. In such cases, consuming acidic foods may worsen symptoms, so individuals with GERD often avoid acidic foods. Treatment under a doctor’s guidance may include rabeprazole sodium enteric-coated capsules or pantoprazole sodium enteric-coated tablets.

　　In addition to the above, difficulty tolerating acidic foods may also be related to gastric ulcers, duodenal ulcers, or stomach cancer. It is recommended that patients maintain a light and balanced diet in daily life.