My 2 toddlers have had coughing & runny nose for over 2 weeks & after treatment there is no change.there are no other symptoms. kindly advise. thanks ?

Doctor can examine: A child who has over two weeks of cough should see a doctor. The doctor can evaluate and look for: allergies, asthma, middle ear infection, sinusitis, bronchitis, pertussis, pneumonia, or perhaps another problem in the throat or chest. Problems can be worse if a patient has asthma or has recurring infections, or if there are household smokers. Air pollution or smog can also worsen people.