my child start bleeding through vaginally immediately after delivery what shall I do?

A child below one month is called a neonate in medical terms. so in the next paragraph when we discuss issues of a child with vaginal bleeding, you should have to understand it to mean neonatal vaginal bleeding.

is it normal to have a child bleed vaginally after delivery?

Answer: yes

it is normal to have a child bleed vaginally after delivery, it is called neonatal withdrawal bleeding. the bleeding looks like bloody mucoidal discharge or light vaginal bleeding

what is the cause of vaginal bleeding in the neonate

for how long this neonatal bleeding can stay?

neonatal withdrawal bleeding stays for a few weeks after the delivery until the maternal hormonal effect of  estrogen is gone