Sick Or Not?

My father went to the emergency room again by himnself, believing that he is having a high blood pressure only to find out that there is really nothing wrong with him. All the bood pressure and ECG test are normal. He always do this and I am getting tired of being paranoid. I don't mind spending time taking care of him, bring him to the doctor everyday if there is really something wrong with him. But he is wasting everybody's time.

He has been measuring his blood pressure (BP) every hour by himself. And when the arrow went up just a little, he will think that he is having a high bood. He is not eating the right food. His food doesn't have any salt or sugar. I feel like he is too afraid to die. I wonder where his faith on this. I hate to say all of these because he is my father. But I sometimes don't know when to believe if he is really sick or not!!