One year and three months old baby fever and cough may be cold air irritant cough, respiratory tract infections, allergic reactions caused by temperature difference training, pay attention to warmth, avoid contact with allergens, medication to improve treatment. 1. Cold air irritation cough: one year and three months when the baby went out suddenly inhaled cold air, stimulate the respiratory mucosa caused by irritation cough, cough can be manifested in the fever after the good, the baby temperature difference training, often outdoor activities, breathing fresh air, gradually enhance immunity. 2. inhalation tract infection: one year and three months baby body resistance is relatively poor, susceptible to bacterial and viral infections triggered by inflammation, the local inflammatory response continues to stimulate, sputum secretions continue to increase, may be in the baby’s fever and have a cough, it is recommended that more outdoor exercise in the sun at ordinary times, to enhance the physical fitness to reduce the probability of infection, the severe cases of pediatric cough syrup treatment as prescribed by the doctor, the amount of 2 years of age or less should be consulted with a physician. 3. Allergic reaction: one year and three months old baby for allergy, contact with allergens, such as pollen, animal hair, etc., airway contraction and narrowing of the cough phenomenon, to find out the allergens, away from allergens, the application of montelukast sodium granules, chlorpheniramine maleate tablets and other drugs. Children’s dosage of the above drugs should be used after consulting with a physician. One year and three months old baby fever is well and coughing for more reasons, it is recommended to consult a doctor in time, do not use drugs privately, so as not to cause danger.