The recovery time after severe lung infection turning white is related to its pathogen, physical quality and other factors and cannot be generalized. Whitening of the lungs refers to the appearance of increased density on imaging chest films and lung CT. Usually bacterial, viral, and other pathogenic infections, tuberculosis, and tumors can cause whitening of the lungs. Therefore, if the lung becomes white with severe infection, the cause of the infection should be clarified first, and tests such as blood tests and sputum culture can be performed. If the infection is a common bacterial infection, such as Streptococcus pneumoniae, Staphylococcus, Haemophilus influenzae, etc., effective antibacterial drugs, such as penicillin, cephalosporins, etc., should be given, and the patient will recover after about 2 weeks of treatment. In case of severe infection whitening of the lungs due to tuberculosis, it usually takes about 6 months of treatment to recover. In addition, patients are advised to eat a light diet during the treatment period, to consume more fresh fruits and vegetables, to strengthen body nutrition, to drink more water, and to avoid eating spicy, greasy and stimulating food, which is beneficial to disease recovery.