In addition, dreaming of slapping others in the face may also indicate that you have a desire to control others or want to control something. This desire for control may reflect that you feel powerless and unable to control some aspects of yourself in real life, so you hope to gain a sense of control by slapping others in the face.
If you often have such dreams, I suggest you think about whether there are similar situations or emotions in real life and try to find a healthier way to deal with these emotions. For example, communicate with friends or family to reduce inner dissatisfaction and pressure, or exercise relaxation skills to reduce tension and anxiety.