My 15 year old faughter has been having pretty heavy chest congestion for 5 days. shes coughing a lot. she had no other symptoms. no fever either.

Continue to monitor: Symptoms less than a week without other problems. The lungs make mucous to wrap around the irritant or infection to help it come out with cough. Drink lots of water-vaporizer at night. If not improved by a week or worsening symptoms especially late onset fever see an MD. http://www.webmd.com/lung/bacterial-or-viral-infections-of-the-respiratory-tract