Hello!
Do you get this problem repeatedly? Also, is it related sny particular time of the day or food or environment or exercise? Are you allergic to any food or dust? This could be allergic rhinitis with or without sinusitis.
Next Steps
Based on answers to my questions above, a nasal spray can be started. If symptoms persist, you might need a ct scan of nose and pns to look for sinusitis.
Health Tips
Try avoiding exposure to dust and other allergens