It sounds like you are experiencing nasal irritation and congestion likely triggered by dust and overheating, which are common irritants. These symptoms often relate to allergic rhinitis or nasal inflammation.

• Using a nasal decongestant spray containing oxymetazoline, such as Otrivin Oxy Fast Relief, can help reduce nasal blockage by narrowing blood vessels in the nasal passages and decreasing mucus production. However, it should be used only as directed and not for more than a few days to avoid rebound congestion.
• To reduce irritation, try to keep your sleeping environment cool and dust-free, and consider using a humidifier if the air is dry.
• Avoid rubbing or scratching inside your nose to prevent further irritation or injury.

If symptoms persist, worsen, or are accompanied by severe discomfort, bleeding, or difficulty breathing, please consult an ear, nose, and throat (ENT) specialist for a thorough evaluation and tailored treatment. If you want, I can explain how to use nasal sprays safely or discuss other management options.To narrow down potential causes, we will need some more information.Please tell me your age and gender.