The low white blood cell of cold is considered to be a viral infection, the white blood cell of cold caused by viral infection is generally low, you can eat more fresh fruits and vegetables, such as oranges, apples, vegetables, etc., are rich in vitamin C, which is conducive to increasing the body’s resistance and immunity, which is conducive to the recovery of the cold, the white blood cell will naturally come up when the cold is well. You can also eat eggs and meat after a cold because they are rich in protein, which can also increase the body’s immunity and resistance, and you can also take drugs to raise white blood cells, such as Ricorun and Diyu Bianchi tablets, when your white blood cells are low. If the level of white blood cells is low, <1.5×10^9, you need to go to the hospital to see if there are other diseases that cause low white blood cells.