There is no such thing as pig hair in medicine. I guess what you said about pig hair wind should be new hair. When a newborn is born, there will be a lot of hair all over the body and obvious back, which is called mane. This is a normal physiological phenomenon. Generally, this kind of mane will gradually fall off naturally without special treatment. But the custom in some places is shaving, which they call pig hair shaving. We don't recommend parents to do this, because it will damage the baby's skin and hair follicles, leading to infection and even the risk of sepsis. If the baby really feels uncomfortable and crying, parents can also go to a regular hospital to buy something called paraffin oil, then dip a cotton ball in paraffin oil and wipe it along the baby's pores.