Morning sneezing and a runny nose that clear with cetirizine and then return is usually allergic rhinitis, not a true cold each time. Common triggers include dust, pollution, mold and the seasonal change itself.
Next Steps
Try a nasal saline rinse each morning and keep your room dust-free with regular cleaning and a clean pillowcase. If it keeps recurring, see a physician or an ENT doctor for allergy testing and a nasal spray suited to you.
Health Tips
See a doctor sooner if you develop facial pain, thick colored discharge, fever or breathing difficulty, since that points to a sinus infection instead.