Child hit their forehead, fell to the ground bumping ? calmed down aft…

Child hit their forehead, fell to the ground bumping ? calmed down after 3-4 minutes. The spot where it hit turned red, but no bruise formed. But what worries me is that a little blood came out along with mucus. That is, she had phlegm before, and after the blow mixed in just a tiny bit of blood came out. Literally a drop of blood mixed with phlegm. I collected it for grandma (mother-in-law), she was supposed to take her for one day. Gave it to her, but didn't say she fell ? didn't want her to talk any more words ??‍♀️ but I can't find the place myself? better if I hit my head (read