What could this be related to, and should I be concerned about a possible illness?

It can be difficult to determine the cause of your symptoms, especially if it is the only symptom present. If you are not experiencing coughing, difficulty breathing, pain, or any other symptoms, it may not be a cause for concern. It is a good idea to monitor the situation and see if any other symptoms develop. If you are experiencing a stuffy or runny nose, it could be related to that. Consider contacting your pharmacist for a personalized consultation to address your specific needs.