Làm ẩm không khí. Chườm nóng lạnh. Uống đủ nước. Sử dụng nước muối xịt mũi. Dùng bình rửa mũi.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Use a steam vaporizer or cool-mist humidifier to reduce sinus inflammation. You can also create moist air by filling a basin of hot water, bending over it (taking care not to get too close) and covering your head with a towel. Breathe in the steam. Or, you can take a hot shower, breathing in the steam. Try to breathe in moist air two to four times a day in 10- to 20-minute intervals. Your home humidity level should be around 45%. Below 30% is too dry, and over 50% is too high. Use a tool called