Relief measures for 3-month-old babies with a little cough depend on the specific cause of the cough. Physiological factors, generally need to eliminate the triggering factors, do not need medication; pathologic factors, such as upper respiratory tract infections or lung infections, etc., need to follow the doctor’s advice to give symptomatic treatment. 1. Physiological factors: temporary mild cough due to adverse environmental stimuli or sucking cold milk. Parents are advised to adjust the room temperature to 22-24 degrees Celsius, breastfeeding mothers should pay attention to keep warm and avoid eating cold food. Give the baby some warm water to help improve the symptoms. 2. Pathological factors: 3-month-old infants are susceptible to the above symptoms when their respiratory system is infected by pathogenic bacteria. It is recommended that the infant be taken to the hospital in a timely manner, laboratory tests to check the specific type of infection, bacterial infections oral amoxicillin to alleviate, to help improve the symptoms as soon as possible. Parents are advised to strengthen the care of infants during treatment, avoid cold stimulation, strengthen the warmth of care, to help shorten the course of the disease. All of the above medications should be used under the guidance of a doctor, avoid self-medication.