Iron deficiency anemia is more common in benign anemia class diseases, typically small cell hypochromia, hypochromia is anemia, small cell means low MCV, MCH in blood routine than normal values, commonly caused by iron deficiency. Causes of iron deficiency anemia Eat less: less meat or no meat, less content inside vegetables, low absorption rate. Throwing more: women with heavy menstrual flow, mostly seen in uterine fibroids, adenomyosis, cervical cysts, birth control rings, peptic ulcers, polyps, erosive gastritis, digestive tract tumors. Poor absorption: plain chili, tea, coffee affect the absorption of iron, while patients with digestive tract diseases absorption is even worse, poor rest, often stay up late, often angry are affecting absorption. Treatment 1, oral iron: routine half a month after the hemoglobin began to rise, about 2 months to normal, in the continued to take 3 to 4 months, a total of six months, iron often have digestive tract stimulation, it is recommended to take after meals, still have stimulation, consider reducing the amount. 2, intravenous supplementation: it is best to go to the hospital infusion, the specific time needs to be directed by a doctor. Special patients: patients who have had digestive tract surgery, such as patients with major gastrectomy, can only take intravenous iron supplements. Note: For patients older than 45 years old, it is recommended that stool examination must be performed to clarify the occult blood condition so as to avoid timely detection of digestive tract tumors.