Two-year-old infants infected with tuberculosis usually have respiratory symptoms as well as systemic symptoms of tuberculosis poisoning, respiratory symptoms mainly include coughing, usually dry cough, gradually coughing up a small amount of white mucous sputum, and even sputum will increase, it is not easy to cough up the phenomenon. In addition, when the pathogenic bacteria invade the blood vessels in the lungs, there will be blood in the sputum, and even hemoptysis will occur easily. When the disease involves the pleura or pleural effusion, chest pain and dyspnea may occur. The systemic toxicity symptoms of infantile tuberculosis are also more severe, and often include low-grade fever, night sweats, lethargy, fatigue, lack of appetite, and fatigue. Therefore, once tuberculosis is considered, early and standardized anti-tuberculosis treatment should be actively given so that tuberculosis can be completely cured.