Hi thanks for your question.
Running stuffy nose,drainage
dawn the throat and sneezing
,all are classical symptoms of common cold
.common cold is usually viral in nature and gets settle dawn of its own..Common cold also produces inflammation of upper respiratory tract
and trachea which produces difficulty in brathing,but no sound on auscultation.
that is aches and pain in body are part of common cold symptoms.
Give him steam inhalations that will help him in breathing plus symptomatic treatment for his symptoms that is nasal decongestants,antihistiminics and pain killers.
common cold takes a week time to get settled.
Hope this answers your question.