Low ferritin is not cancer because ferritin is the main storage form of iron in the body and low ferritin is commonly seen in patients with iron deficiency anemia. Low ferritin is commonly seen in patients with iron deficiency anemia due to insufficient iron intake, impaired absorption in the gastrointestinal tract, or chronic blood loss, which eventually results in low ferritin. If low ferritin is present, the patient should go to the hematology department of the hospital for a routine blood test to see if there is microcytic hypochromic anemia. If the ferritin is low and there is also microcytic hypochromic anemia, the patient can be diagnosed with iron deficiency anemia. foods. On the contrary, if ferritin is high, it should be noticed because patients with certain malignant tumors can cause an increase in ferritin, so low ferritin is not cancer, and people with high ferritin should be alert to whether it is cancer.