If you have low red blood cells after chemotherapy, you can eat foods with high content of protein and iron, and you can also take blood replenishment products or transfusion of suspended red blood cells under doctor’s guidance. 1. Dietary supplements: If you have low red blood cells after chemotherapy, you can eat more foods with high protein content, such as lean meat, milk, eggs, etc. You can also supplement foods with high iron content, such as animal liver, fresh fruits and vegetables. 2. Blood replenishing agents: low red blood cells after chemotherapy can also be regulated by using blood replenishing agents under the guidance of doctors, such as vitamin B12, ferrous sulfate and so on. 3. Blood transfusion: when the red blood cell index is significantly reduced, suspension of red blood cells and other component blood transfusion can be given. If there is a significant decrease in red blood cells after chemotherapy, it is recommended to go to the hospital in time for a review, according to the cause of the disease to receive standardized treatment under the guidance of a physician, and do not use medication arbitrarily on your own.