When children are infected with tuberculosis, the main symptoms include the following: 1) symptoms of tuberculosis poisoning, including low fever, weakness, night sweats, weight loss, etc. 2) respiratory symptoms, cough and sputum in mild cases of tuberculosis, chest pain, coughing up blood, difficulty in breathing in severe cases of tuberculosis, etc. 3) extra-tuberculosis symptoms, such as high fever, coughing up yellow sputum when combined with bacterial infection, and sometimes gastrointestinal symptoms, such as nausea, vomiting, etc. Gastrointestinal symptoms, such as nausea, vomiting, etc. When the above clinical manifestations appear, the possibility of tuberculosis is considered, and patients need to actively seek medical attention and improve chest X-ray, sputum check for antacid bacilli and other related tests. If the patient’s chest X-ray indicates a tuberculosis lesion and the sputum detects Bacillus acidophilus, the clinical diagnosis of tuberculosis is very clear.