Does common cold cause runny nose?

A cold virus irritates the lining inside the nose. The lining responds by making more mucus, which helps trap particles and move them out. The discharge may begin clear and become thicker as the illness changes. Sneezing, congestion, cough, sore throat, or tiredness may occur alongside it. Allergies and other irritants can also cause a runny nose, particularly when symptoms follow exposure and recur in a predictable setting.

Blow your nose gently, one side at a time, and use soft tissues to protect the skin around the nostrils. Saline spray or a saline rinse can loosen mucus when prepared and used according to instructions. Drink regularly, rest, and avoid smoke. A pharmacist can help you choose a suitable treatment, especially if you are caring for a child, are pregnant, or take other medicines.

Arrange medical advice if symptoms are severe, keep worsening, last beyond the expected recovery period, or come with facial pain, persistent fever, or breathing difficulty. Seek urgent help for severe trouble breathing, swelling of the face or throat, confusion, or unusual drowsiness. A clinician can distinguish a cold from allergy, sinus problems, or another infection.

Does the pattern fit a cold or an allergy? Which saline or medication option is suitable for me? What symptoms would mean I need an examination?