One of the serious side effects of chemotherapy is bone marrow suppression, which leads to the lowering of white blood cells. Generally, when the white blood cells are lower than 3.5×10^9/L, chemotherapy needs to be stopped, and white blood-boosting drugs need to be applied, such as oral diyu zhenbai tablets, and also li kejun tablets. These two kinds of one is Chinese medicine, one is western medicine, can be used alone or in combination, may be more effective. At the same time, patients also need to apply to increase nutritional food as well as supplementation of fat milk, amino acids and so on can also help to raise the white blood cells. If the white blood cells are even lower, subcutaneous injections should also be considered, as oral medications alone may not be effective. In addition, severe myelosuppression may not restore the white blood cells even with white blood cell boosting alone, in which case chemotherapy may not be possible or a different regimen may need to be changed at a later date.