Scientists have found that positive words can not only make people feel happy, but also improve the composition of blood and increase the ability of blood to absorb nutrients, thus improving the immunity of cells. Scientists say that in order to make people feel better about themselves, it is necessary to carry out psychological treatment for 5 to 15 times in a row, so that patients can relax first, and then doctors begin to say good things about them, and what they say is different for different people. Some words have obvious functions, such as "love" and "kindness".

Scientists say that human cells seem to "understand" these words. Using "language therapy" to cure colds in life is also faster than taking medicine alone for 5 days.