Ok, this had started happing to me like 3rd or 3th grade where at first i could taste blood but i wasnt bleeding at all and in due time it had past until i was in middle school only this time instead of tasting blood i was smelling it and i would look at all my friends and ask are any of you guys bleeding they said NO!?...why and i told them cause i smell blood and until this day i still do now in high school.
it that even normal
People with brain tumors often smell and taste the same thing... usually burning, but it can be other smells and tastes as well.
I advise you to go get checked out.
Do you have good dental hygiene?