Do you notice that your child's lower baby teeth have not yet wiggled out yet, but the adult teeth emerging behind them? That's pretty cool and the kids like to call them "shark teeth".
This is very common and not a reason for alarm. Typically the baby teeth will become looser as the adult teeth emerge and the tongue pushes the adult teeth forward forward with continued eruption and function. Encourage your child to wiggle the baby teeth out if this happens - this is not an emergency and can be monitored at regular checkups if no other pain is present.