I understand that irritation in your nasal septum causing itching, a runny nose, and chest infection can be quite uncomfortable. These symptoms may be related to allergies or an underlying respiratory issue.

• You might benefit from an anti-allergic medication like Air-M Tablet, which contains Montelukast and Fexofenadine. These help reduce inflammation, mucus production, and allergic reactions such as itching and runny nose.
• Avoid known allergens or irritants such as dust, smoke, or strong fragrances that could worsen your symptoms.
• Keep your nasal passages moist with saline nasal sprays and maintain good hydration.
• Since you mention a chest infection, it is important to see a pulmonologist or an ENT (ear, nose, and throat) specialist promptly for a thorough evaluation and appropriate treatment.
• If you experience worsening symptoms like difficulty breathing, high fever, or persistent cough, seek emergency care immediately.

Consulting a specialist will help confirm the cause and guide you on the best treatment plan tailored to your condition. If you want, I can explain how these medications work or suggest home care tips.To narrow down potential causes, we will need some more information.I understand you're dealing with irritation in your left nasal septum causing itching, a runny nose, and chest infection. To assist you better, could you please share your age and gender?