my son has cold for more than one week still he has mucus on nose what is the reason

A. Cold is a viral illness and symptoms could be sneezing, running nose, cough sore throat, nasal congestion and fever. Treatment consists of antihistamines antipyretics analgesics and decongestants . steam inhalation would be beneficial . Medicines like sinarest/wikoryl / Alex cold can be given in a proper dose according to the weight for 3-5 days as per the symptoms . if you are concern regardihng this query for this it is better to take guidance with your doctor and doctor will give you all clarification regarding your query so you can consult your doctor once