Prolonged cold: Sometimes a URI will resolve and be non-infectious, but the after effects continue. Sometimes the nasal, sinus, and throat mucous membrane takes time to recover. You have to keep treating the symptoms with things like nasal saline spray's, mucus thinners like guaifenesin, and sometimes things like decongestants or nasal steroid sprays. If it worsens again or new symptoms, see MD.
Answered 1/1/2017
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