i used to have regular nosebleeds myself. got myself checked out at the hospital. fortunately nothing bad was found. nose blood vessels seemingly too thin. strangely after giving birth to my firstborn, i no longer have nosebleeds but now he often has nosebleeds. thinking he has inherited the thin blood vessels from me while my blood vessels has somehow thickened during confinement.
My elder kid had this for a period of time but it seems that there wasn't an issue. No pain or lingering side effects. He would just suddenly have a nose bleed then it would stop on its own in a few minutes.
Best to consult a pediatrician
Better to check with doctor