The water in the gums has moved from a high to a low concentration of water.
Explanation:
Salt water has the power to detach a swollen gum because it is a hypertonic solution, as it has a higher salt concentration than the gum exit concentration. When salt water comes into contact with swollen gums, gum cells seek to balance the environment and lose water in an attempt to decrease the salt concentration of salt water. The outflow of water from the cells promotes a decrease in gum swelling.
In addition, salt is a natural and widely used bactericide.
The water in the gums has moved out due to the high concentration of salt in the solution. The salt in the solution is hypertonic because there's a higher concentration of salt in the solution than water which has a lower concentration.
