If pneumonia causes malaise, it is considered to be related to the systemic inflammatory response syndrome caused by hypothermia. It is recommended to measure the body temperature regularly and to improve the blood count, inflammatory markers, C-reactive protein and other related tests. If the symptoms of malaise are very serious, electrolyte and chest CT examinations should be performed to exclude serious pathologies such as electrolyte disorders, hypokalemia, and malaise, and to observe the patient’s recent diet for poor appetite or loss of appetite. If diuretic drugs are used, it may be related to the hypokalemia caused by diuretic drugs. In short, if pneumonia causes weakness, it is necessary to improve the relevant tests in time to clarify.