I see this a lot of the time, in families. He, or she, is the one everyone else says is sick. Not always, but a lot of the time, it's the whole family who has the problem. It's easier for them to say that this one member of their family is sick, than it is for them to admit that it's the whole family who needs to be healed. I see it all the time.
Forgiveness is a big part of healing.
One of the central Christian understandings is that if we want to be forgiven and healed, then we have to forgive and restore everyone who is in a wrong relationship with us. Jesus said, over and over again, that forgiveness is the key to discovering the power of God's love and mercy. If you're not being healed, always look and see if something needs to be forgiven, first. One of the things people most often forget is that healing takes time . Sometimes it happens in stages, in a progression.