The symptoms looks like nasal allergy. The definitive treatment of the condition is to avoid allergic agent. If in spite of this the symptoms persists then you will need tablets for short term and nasal spray for long term.
Start a diary at note every episode of allergy and this will give an idea of the allergic agent and the try to avoid it.
Next Steps
Consult ENT specialist online or locally
Health Tips
1. Start steam inhalation every night before sleep
2. Avoid allergic agents