What do they say is the physiological use of cucumber?

I don't quite understand what you mean by physiological use. In addition to eating, it also has the following uses:

1, which can be applied to the face, and cut into thin slices to replenish the moisture of facial skin, which is safe and hygienic;

2, bitten by mosquitoes, apply cucumber juice with appropriate amount of vinegar to the affected area to avoid leaving traces;