According to psychological analysis, people are more satisfied with their looks when looking in the mirror than when looking at photos, so this is normal. In addition, it is said that some mirrors themselves have a certain slimming effect (beautiful photos, good mirror sales, happy manufacturers, you know).

Self-timer skills are also very important, such as sticking your chin forward, holding the camera higher, not shooting the full front of the micro-side of your face, not facing the light source completely, you can have some shadows appropriately, and the other hand can cover the defective part properly and adjust the distance of the camera position appropriately.