Hello,
Welcome to Health Care Magic. I read carefully your query and I understand your concern.
You have right when you say that congestion nasal symptoms (runny nose and sniffing) caused from flu or
cold last for few days, exactly 7 to 10 days.
You said that have continuing nasal symptoms that started about a year ago, the causes maybe are a
allergic rhinitis that have seasonal or year around symptoms, other cause are nasal irritants : changes with the weather dry or cold weather,
smoking, alcohol intake, air pollution ,chemicals or perfumes; another cause are medications like nasal sprays especially decongestant nasal spray you should avoid them and replace with nasal saline products ,other medication are some
blood pressure medication, antidepressants etc; chronic
sinusitis etc.
Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions.
Kind regard,
Dr .Marsida Janko