Gurudev, are bodily diseases or disorders linked to our karmas?
Yes, some of them are linked, but not all. Some are linked to your actions of the past, and some are a result of your own wrong deeds that you have done now. That is why it is called Prajnapradha (a wrong deed committed despite having the knowledge or discretion of right and wrong).
So when you are not fully attentive or in awareness, and commit some wrong deed, then your health also suffers due to that.