The causes of acute gastritis are varied, primarily involving external factors, internal factors, and psychological factors. For example, irregular eating habits, consuming foods that are too cold or too hot, and overly coarse foods can all irritate and damage the gastric mucosal barrier. Additionally, some medications can directly cause congestion of the gastric mucosa, and acute gastritis can be directly caused by bacterial or viral infections. The gastrointestinal tract is regulated by various hormones, and if one is overly tense, agitated, or exhibiting symptoms of neurosis, this can affect the normal levels of the mucosa through hormonal regulation, leading to mucosal damage and triggering inflammation.