Wow! thats scary, when i do treatments and i find something showing on thier feet, i ask them if they have ever had any problems with that particular area so they are telling me what thier problems are and not the other way around. The point is to find these areas of blocked energy and stimulate them to help the body to heal itself.
Any therapist diagnosing is ethically and probably LEGALLY wrong, and equally any client going for reflexology looking to be diagnosed should be sent straight to the doctor.