I have a doubt, I don't know this is myth or true. After my daughter was born, and we took her to pediatrician doctor the doctor said keep looking at child face whenever she start crying. By her facial expression you can understand why she is crying. ( This is from when was 2 month old ) First thing I assume this is myth and when she starts crying her mother just starts looking at her face only instead of making her cheerful. As I am not a doctor can any expert confirm this is myth or it is true.