When one is having a critical health problem and the reason cannot be identified, it is best to look beyond the normal reasons.
One special reason is to examine the relationships with others.
It is normal to link cancers with conflicts with other people.
For example, if you have breast cancer, you have to resolve the conflicts with you family members, especially your spouses and children.
Similarly, if one suffers kidney damage and has to go for dialysis 3 times a week, look at our family relationship.
Does one treat her/his parents well?
Does one has extra marital affairs?
If one has, such conflict has to be resolved if one wishes to recover from the critical health problems.