At present, fish therapy shops promote that "parent fish" can eat dead skin on human body because they have no teeth, thus making skin smoother, promoting blood circulation and eliminating bacteria. Some merchants claim that they can treat psoriasis and eczema, but this claim has not been verified.
To some extent, "parent fish" can really clean people's skin, but the cleaning ability of small fish is not strong. If you really want to remove dead skin from people, you might as well go home and rub it yourself, but it will be cleaner. People who choose to go to fish pedicures should feel the new "fish pedicures" for the sake of experience.
If consumers want to treat beriberi caused by fungi, I think the effect is not great. Maybe small fish can really swallow human dander, but the amount is very small, and there are a lot of fungi on the feet, which can't treat other foot diseases at all. Therefore, it is unrealistic to treat beriberi by fish pedicures.
So the fish used in the fish therapy hall are starfish and reddish cuttlefish. They worked hard at their posts and didn't retire. Once they die, they will be thrown away directly by the boss and no one will eat them at all.