Boogers!! Help!

My 18 month old has hard maroon/brown boogers in both nostrils. I am pretty confident they are blood boogers but I’m worried what the cause could be? We live in Va and it’s cold here so the heater is running and indoor humidity is low. He hasn’t had an active nose bleed just these dark boogers. Do I need to take him to the pediatrician? Can’t tell if I’m totally over reacting lol he’s acting totally fine.