Your father's problems are really common in the mainland. Many of these phenomena are caused by the mistakes of traditional culture. Some people may say that this is superstition, whether it is superstition or not. Listen to me and make it a topic of conversation after dinner.
This situation is more inclined to the issue of ancestral graves. Please find out whether the location and present situation of your ancestral grave are safe. If they are worn out, please repair them quickly. After all, people in China are homesick for water, and their ancestral graves are dilapidated, so their master's heart is hanging, and it is difficult for their bodies and minds to be smooth naturally, so there is something wrong with their bodies. But if you are in poor health, you still have to go to the hospital for a complete examination. Don't delay the illness. After all, life is still science, and science is life, which is a necessity for modern people.
For your reference