In the following clip, the doctor identifies Mr Wilson's problem.
The doctor starts by explaining a medical term (chronic) to Mr Wilson. He does this by explaining the word and the opposite of the word (acute) to reiterate (repeat to show importance) the point and confirm the full meaning to Mr Wilson.
"Long standing" means that the problem in question has occurred over a long period of time.
"Out of the blue" means something that arises (happens) unexpectedly or unplanned.
"Straight after" means immediately after.
"Trigger" means to cause something to happen, eg: "Now, have you noticed that any particular foods that trigger the heartburn especially fast?"
"Bring it on" is a phrasal (multi-word) verb meaning to cause something to happen, in this case in a negative way.
"I never touch" spirits means that the patient (avoids) the consumption of spirits and goes on to say "I've seen too much of what spirits can do to other people". This reaffirms the point he is making.