People say that water is a symbol of wealth. If you wash your hair and take a bath on the second day of the first month, it means washing away your fortune, which is unlucky and has a greater impact on your family.
You can't take a shower and wash your hair on the second day of the lunar new year. This is a historical custom formed imperceptibly. There is no relevant scientific basis, but you can choose to abide by it for the sake of family harmony.
There are still many rumors among the people. For example, on the second day of the lunar new year, avoid dumping sewage and garbage, sweeping the floor, and don't engage in sweeping the floor, because it is easy to take away the wealth at home.