The causes of sinus erosion are, firstly, H. pylori infection, which stimulates toxins to destroy the gastric mucosa, causing chronic gastritis, which in turn manifests as sinus erosion; secondly, it is caused by medication factors, such as non-steroidal anti-inflammatory drugs and hormonal drugs, which damage the gastric mucosa, thus leading to erosion; thirdly, erosion is also easily caused by irregular lifestyle, long-term alcohol consumption, etc.