What should you know about cough due to itchy throat?

An itchy throat can follow a common cold, nasal allergy or exposure to dry air, smoke, dust or fragrance. Mucus draining from the nose can keep the throat irritated and cause repeated throat clearing. Food allergy is a different possibility when itching begins soon after a particular food and comes with hives, swelling, vomiting or breathing symptoms. The sensation itself does not identify one cause, so timing and accompanying symptoms are useful clues.

Sip water or a warm drink, keep indoor air comfortably moist and avoid smoke or strong fragrances. Saline nasal care may help when congestion or drainage is present. If symptoms follow dust or pollen exposure, reduce contact and wash your face after being outdoors. A pharmacist can advise whether allergy medication is suitable and how to use it. Do not deliberately re-test a food that caused a suspected allergic reaction.

Get emergency help for throat or tongue swelling, trouble breathing, wheezing, faintness or a rapidly spreading reaction after food or medicine. Arrange review if the cough persists, keeps returning, causes vomiting, disrupts sleep or comes with fever or worsening pain. A clinician can assess the throat, nose and chest and decide whether allergy, infection or another condition needs treatment.

What pattern suggests allergy rather than a cold? Could nasal drainage be irritating my throat? Is allergy medication appropriate? What should I do if this happens after eating?