How can salt water rinse make the hole where the tooth was pulled out feel so much better?

Cleanses area: Salt water, especially when made with sea salt, has the power to gently cleanse the wound. It helps shrink tissues to aid in the healing process. Regular mouthwashes, even those without alcohol, are too harsh. Make a salt water rinse by adding 1/2 tsp. Of salt to a 4 oz. Glass of warm water. Swish gently.

Prevents infection: If you the area where the tooth was extracted free of debris by rinsing with salt water you are less likely to get an infection in that area. Warm salt water has antii-bacterial properties and promotes healing.

Actually....: The main effect of salt water is due to its unique yet simple ability to reduce the inflammation in the soft tissues. This effect takes places simply via balancing the localized contrast in osmotic pressure in the site and the water (main ingredient of inflammation) simply diffuses out of the tissue, just to balance the high concentration of salt outside. Hence, feeling comfort and ease.

Salt water rinse: removes bacteria and keep the mouth clean. Be sure to rinse after every meal and snack, making sure that the water removes any bits of food.