Hi L.! It can be a bit nerve-racking to see our little one's nose start bleeding for no apparent reason, can't it?! Out of my 3 boys, two of them get nose bleeds. My middle child who is 3 1/2 started having them about a year ago after a nasty battle with recurrent sinus infections. We treated them with a steroid nasal spray, vaseline and topical antibiotics to get them to stop. My pediatrician said that some nose bleeds can actually be caused by a bacteria, hence the antibiotic ointment. Now, my youngest who turns two next week, got his first nose bleed a few months ago after a severe cold. We didn't treat him with anything but a little vaseline up the nose and he's only had one other since, which was treated the same. SOOOOO...to make a long story even longer...nose bleeds can be cause by many different things, ie dry air, bacteria, sinus conditions or illnesses. In my opinion, the best route to go is to leave a message with your ped's nurse and talk to her/him about it and see if it warrants a visit with the doctor. Most likely not, but it's always best to be safe than sorry when it comes to our babies. Good luck with everything L.!