Daughter hitting herself in the head

Chey🌷

My Charlotte (16 months) has developed a habit of hitting herself in the head or banging her head on the wall, floor, oven door, whatever is easiest to get to when she’s frustrated. I’ve tried to tell her “ouch”, making a sad face, gently saying, “No No”, telling her, “Nice touches” and nothing is working and it’s breaking my heart. I need some other suggestions on stopping this.