Gastritis may cause dizziness and weakness. First of all, during the attack of gastritis, patients will have different degrees of pain, because the pain will stimulate the human body’s vegetative nerves, causing the peripheral blood vessels to contract and appear the phenomenon of insufficient blood supply, resulting in dizziness and fatigue. Secondly, due to the influence of gastritis, the patient’s digestive and absorption system is weaker, and cannot obtain the required nutrients normally, resulting in dizziness and other symptoms due to insufficient supply of nutrients. In addition, gastritis will affect the patient’s iron absorption, which will lead to anemia due to iron deficiency for a period of time, resulting in dizziness and weakness. If gastritis is diagnosed, early treatment is recommended to minimize the adverse effects of the disease.