How baking soda help with clearing sinuses?

Anonymous
I had problem with my throat it had a lot of mucous and I have Acid reflex, so my doctor prescribed me medication and also instructions on how to clean my Sinuses because that can also be causing my throats irritation since it's a part of my throat. She said to mix with salt, baking soda and warm water. I didn't understand it at first so it went down my throat instead and I had to spit so much but it helped with clearing it. Just curious on how the baking soda helps?
How baking soda help with clearing sinuses?
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