Explanation versus reasons. Why am I so tired?

Doctors are good at giving explanations. I have been scratching my head over the cause of my symptoms, which are uncomfortable abdominal bloating and extreme tiredness, so that I fall asleep as soon as I sit down.

Here are some explanations:

1 It is all the result of the chemotherapy - someone told me that the side effects persist as long as the course of treatment - in my case 6 months. Someone else said it takes at least a year to get over them.

2 It is still the neuropathy caused by the oxaloplatin

3 It is the surgical effect of the anastamosis. a] it is the blind loop left by the surgery causing i)dumping syndrome; ii) excessive insulin secretion; iii) exaggerated gastro-colic secretion. b] it is sluggish flow because the narrow anastamosis. c] it is caused by bacterial overgrowth. d] it is caused by fungal overgrowth.

4 It is caused by a low potassium because I have been on steroids for so long.

5 It is steroid induced myopathy

6 It is because I am reducing the steroids

7 It is because I am anemic

8 It is all in the mind

9 I am depressed at the prospect of dying

10 I am depressed because I have retired and not found a new role

11 I have aged three years since I've had this disease and what I have are the symptoms of old age.

12 I have been fighting it long enough and I am ready to give up

13 I have a scan coming up and I am anxious

14 The cancer has come back.

You see an explanation is not the same as a reason. Without evidence an explanation is just speculation