Cold and cough, low fever is a common cause of bacterial upper respiratory tract infections, if the previous antibiotic treatment is still not good, considering that the bacteria are resistant to drugs. In addition to bacterial infections, there may be mixed bacterial infections caused by viruses, such as Mycoplasma pneumoniae, EBV, the infection can cause recurrent fever, even if the temperature rises for more than ten days do not go down, there can be cervical lymph node enlargement, skin rash. If the cough is irritating cough, the spirit can be, white blood cells and neutrophils in the normal range, the possibility of mycoplasma infection is relatively large. You can check the EBV and antibody test, review the blood routine, chest X-ray, C-reactive protein, Mycoplasma pneumoniae, through the examination can clarify the cause of the disease.