I have pain near where i had my appendix removed over a year ago, its a pulsing pain that comes and goes what could it be?

Many possibilities: Abdominal pain needs face-to-face evaluation that can only happen by making an appointment to see your primary care physician or the surgeon who performed your appendectomy. They will ask many questions, perform a careful physical examination, and may recommend lab and/or diagnostic tests. There are simply too many causes of abdominal pain to speculate with this information.

Could be: Could be many things. Best thing is to get an exam. Don't think is anything serious.