Is there any danger if you masturbate everyday?

You might have too much fun ------ but not likely at only once a day.

If you are a girl or a circumcised boy or you hold your foreskin back to masturbate by rubbing the bare head, you might create a friction burn. If you slide your foreskin up and down it's possible to rip your frenulum on an enthusiastic down stroke. That's not a real problem unless it hurts a lot for you. I tore mine several times and it didn't hurt much for me but it did bleed a bit. It heals rather quickly.