Many thanks for your kind inputs, KatieV, Marilee, MooseMom and iolaire, I am very appreciative of your important information.
It is interesting to read about the different causes for kidney pain, listed by the Mayo Clinic ... and interestingly, when
Katie mentioned her own kidney pain in connection with UTI's, I remembered that I also had regular occurring UTI's when I had kidney pain and sadly enough, the (many) doctors I consulted at that time did not see the connection between my kidney pain and the UTI's I was suffering from ...
And as Charlie has mentioned, pain is different for everyone and it is important to find out where it stems from in order to treat the underlying cause ...
Many thanks to all again from Kristina.