Infants have short nasal cavity and rich nasal mucous membrane blood vessels, so it is easy to have nasal congestion symptoms after a cold. How to relieve nasal congestion: 1. Clean nasal secretions, you can use clean cotton swabs to gently roll out nasal secretions, if the secretions are too hard, you can put a few drops of clean water to soften them and then roll them out. 2. Apply hot compresses, use a warm and wet towel to apply hot compresses to the root of the nose to relieve nasal congestion. 3. Spray and wash the nasal cavity with sea salt water to flush out nasal secretions and relieve nasal congestion. 4. Or because the fever appears uncomfortable symptoms, you can apply antipyretic drugs ibuprofen, acetaminophen, it is not recommended to just take compound cold drugs. If the baby continues to have a high fever that does not subside, you need to go to the hospital in a timely manner.