The BCG vaccination of newborns on the first day of life plays a very important role in preventing tuberculosis, but some children develop left axillary lymphatic tuberculosis in the first 3-6 months of life, which has a certain impact on the health of the child, and reasonable treatment is especially important for the child. First of all, correct diagnosis is very important and has the following characteristics: 1) the age of onset is usually 1-3 months; 2) the lesion is in the left axilla; 3) there is no fever; 4) there is a history of vaccination; 5) the lymph nodes are enlarged and dark areas of fluid are visible on ultrasound. Secondly, reasonable treatment is especially important, and the common treatment plan is tuberculosis lesion removal, simple incision and drainage is easy to recur, and several children are cured by our tuberculosis lesion removal after several months of change of medication after incision and drainage.