My kids were playing and my daughter hit my son on the side of the head on his ear with her hand. His nose started bleeding immediately after. He otherwise seems fine. Pupils are good and no dizziness. He is just getting over a cold, could fluid in his ear be a contributing cause to the nosebleed?
HIIT could just be a coincidence that he was having cold, so crusting in nose fragile enough for nose bleed, and he was hit by sisterNosebleeds are very common in child Chat Doctor.