Hi thanks for contacting health care magic... This congestive symptom can be from viral infection of upper respiratory tract ... Any cough more than 3 week should be evaluated through chest x ray. So investigate with .. 1.Chest x ray 2.CBC If CBC shows neutrophilia than antibiotic has to be started ... For congesion relief take benadryl like antihistaminic drug... Do salt water gargles... Avoid smoking exposure .. Take more water and daily drink turmeric powder in milk (if you are taking milk daily as sometime in old age milk cant digested) If antibiotic needed than take levofloxacin for 5 days ... If still no improvement consult pulmonologist for auscultation and further examination.. Hope your concern solved