Frequent acid reflux in the afternoon may be caused by mental factors, dietary factors, chronic gastritis, peptic ulcer and other reasons. 1. Mental factors: due to work tension, often repressed, anxiety, sleep time is relatively small, resulting in gastric autonomic nerve disorders, which can lead to frequent acid reflux in the afternoon, usually adjust the mood, release the pressure can be gradually relieved. 2. Dietary factors: eating too much at noon, drinking strong tea, coffee and other factors, stimulate the secretion of gastric acid increases, resulting in frequent acid reflux in the afternoon. 3. Chronic gastritis: gastric mucous membrane damage gastric mucous membrane, there is inflammation, erosion and other conditions, gastric acid secretion is more, so there is a high acid reflux in the afternoon, accompanied by nausea, vomiting and other symptoms. 4. Peptic ulcer: gastric mucosal damage to the ulcer surface, in the afternoon, the stomach is empty, gastric acid secretion increases, there will also be acid reflux, nausea, stomach pain and other symptoms. Frequent acid reflux in the afternoon, there may be other reasons, it is recommended to consult a doctor in a timely manner, to identify the cause of the disease, and follow the doctor’s instructions for treatment.