Buddhism is the sea, and only faith can enter it. But faith is not superstition. If believing in Buddhism becomes superstition, it will lose the meaning that Buddhism really benefits all beings. I am in poor health today. If I go to the temple to worship Buddha, I will definitely be fine. In a few days, I will vilify Buddhism without feeling. You have to persevere in everything in order to have induction. There are two kinds of diseases for families with poor health: a physiological disease, and the treatment of this disease is urgent. Go to the hospital for examination and timely treatment. The second is karma, which often needs to be resolved sincerely, but it may not be cured immediately. Eliminating karma and resolving grievances depends on perseverance and great compassion, which will definitely recover in time. You want to pray for health for your family in many ways. For example, you can make a vow to read 49 or 108 Sakyamuni Sutra for your family, or release, feed, smoke, apply medicine, seal scriptures, worship Buddha and so on. In this way, I will repay all the sentient beings in the 10-party dharma circle who are as painful as your family on behalf of my family, and then return them to my family. As long as you are willing to do it, Buddha and Bodhisattva will definitely feel it. If you are sure to do this, then don't go to Taoist temples or other temples to worship some Taoist gods, because these gods are still in the six divisions of the wheel of karma. Although they have induction, they will inevitably reincarnate and eventually degenerate. This is not true.
Finally, I sincerely wish your family can get rid of karma and feel at ease.