Take Heed. My youngest child had a 'cold' for 18 months. I took her to the pediatricians office constantly. She was congested, appeared to make it hard for her to breathe, stuffy nose (with yellow/green mucus), and had recurrent bouts with the croup and all this could be with or without fever. During this time she would also get ear infections because of the congestion. She eventually had tubes put in her ears. That solved that problem, but not the congestion, wheezing, stuffy nose..etc. There are four doctors in our pediatrician's office. I made my rounds. Finally, I told the last doctor in the group, "Do not tell me my daughter has a cold. No one will have what she has had for 18 months." He looked back in her file and noticed all the symptoms she had in the past. He told me I think she has RAD (Reactive Airway Disease). This is another name for asthma. They do not like to diagnose children that young with asthma. He immediately put her on Singular chewables 1 daily and Zrytec elixer twice a day. He put her on a nebulizer to be used twice a day (am/pm) with pulmucort respules. Within 3-4 weeks she was better. Her congestion was almost gone, the runny stuffy nose gone. She still had some bouts with the croup and getting stuffy and congested during the season changes, but overall a lot better. When she had these bouts with the croup he put her on oral liquid Albuterol. Later, when she was about 2 1/2 he started her on Albuterol respules to use through the nebulizer as needed. She is 5 years old now and still takes Singular daily and Zrytec as needed. She hasn't used the nebulizer for about 9 months. The doctor and I seem to think she is outgrowing the asthma part. She may always have allergy's as it relates to the season's, but that is manageable. TRUST your instincts. Doctors are not God! If you think it is something that needs to be checked, pester them until they run tests or listen to you. Take note of when the worst time is (season changes) or if it is all the time. You might want to suggest they prescribe him Singular. It might be just allergies. Be persistant, you are your child's spokesperson and essentially the only person he has to speak for him. Hope this helps.