Ghost Writing and Screen Jumps Around

My screen acts all nervous jumping around and ghost typing texts when I am texting and even send them…it’s so random but happening too often. I have booted many times and it doesn’t fix for long. I darken the screen and then bring it back up to clear it. It has never been wet nor have I dropped it on a hard surface like cement. I have dropped in on carpet. Is the circuit bad or somehow dirty?