Whether the bleeding of gastric ulcer stage a1 is serious or not is related to the site of bleeding and the amount of bleeding, if the blood vessels of the bleeding site are ruptured and the amount of bleeding is large, then the bleeding is serious, if the bleeding is superficial, then it is not serious. 1. Serious: if the diameter of blood vessels at the bleeding site is large, the bleeding volume is large, if the bleeding is not stopped in time, the manifestation of hemorrhagic shock may occur, which is life-threatening, so it should be actively transfused, hemostasis, surgical treatment, and stabilization of the condition. 2. Not serious: gastric ulcer A1 stage, that is, the acute stage ulcer, if the bleeding site diameter is small, without damage to the arterial blood vessels or gastric mucosa surface blood clot hemostasis, so that the bleeding is small, and will not be life-threatening, but also should be actively go to the hospital for treatment, so as not to bleed again. Once the gastric ulcer bleeding, should actively cooperate with the doctor, strictly follow the medical advice treatment, in order to avoid adverse consequences.