probably mental illness, bipolar, schizophrenia, etc. They had no way to describe such ailments. Christ healed those people all the time.
I don’t think we have the power/strength that he had because of our imperfect faith. I also think it was easier for those being healed to believe in Christ than in a minister, bishop etc. I believe Christ can heal me. My neighbor? Uhh 😂
My take 🤷♂️