How does a salt water rinse work for toothache/inflamed gums?

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I had my wisdom teeth taken out and I’ve been using an anti-bacterial mouthwash (chlorhexidine) but I’ve found a salt water rinse actually works better for getting rid of the pain/inflammation/aching.

So why does something as simple as salt and water work better than a dentist recommended antibacterial mouth wash?

In: Biology