It is not recommended to give syrups to babies under 1 year old due to associated risks and minimal benefits. It is best to use nasal hygiene (nasal shower) as a solution for a baby with a coughing and congested nose. You can warm up saline solution before administration to make it more comfortable for the baby. Offering more fluids to the baby can help thin mucus and make it easier to eliminate. Keeping the baby's room humid with a humidifier and elevating the mattress slightly can also be beneficial. If the situation worsens or if you have any other questions, do not hesitate to seek further advice. Proper nasal hygiene can help prevent potential complications.