It sounds like you're experiencing common cold symptoms with a runny nose and fatigue. These symptoms often improve with rest, hydration, and over-the-counter remedies.

• You might consider an antihistamine like levocetirizine, which can help reduce runny nose and sneezing; however, it may cause drowsiness in some people.
• Make sure to drink plenty of fluids and get adequate rest to support your recovery.
• If symptoms worsen, persist beyond 7–10 days, or you develop high fever, difficulty breathing, or severe fatigue, please see a general physician or an ear, nose, and throat (ENT) specialist.

If you want, I can explain how antihistamines work or suggest other supportive care tips.To narrow down potential causes, we will need some more information.Please tell me your age and gender. I understand that you're suffering from a cold with a runny nose and feeling lazy.