Grandma is 95 years old and dying. She may not survive this week. I don't know what to say to my old father.

We should tell the truth, let them see each other for the last time, and then walk the most together. So the old people won't have regrets. Your grandmother is 95 years old. She has a long life and enjoys happiness. Your father is 75 years old. He should understand the truth of birth, illness and death and be mentally prepared. I think we should explain the situation to your father as soon as possible, persuade him not to get excited and angry, and prepare medicine for him and take it with him.