Three-month-old babies sneezing, nasal congestion and mild cough may be caused by colds, need to strengthen care, if necessary, consult a doctor according to the type of cold and follow the doctor’s instructions to apply medication. Sneezing, nasal congestion and mild cough may be caused by colds and flu, daily care should be strengthened, such as maintaining the appropriate indoor temperature and humidity, open the windows diligently to maintain air circulation. Pay attention to keep warm, avoid cold. If not relieved, need to take the child to the hospital for medical treatment. Colds are mostly caused by viral infections and generally do not require special medication and can be cured on their own. If secondary bacterial infection, you can use antibiotic treatment under the guidance of the doctor, such as cefixime granules. Three months baby sneezing nasal congestion mild cough may also have other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.