As of Season 3, it's made pretty clear that his Electromagnetic Hypersensitivity emerged around the time of his divorce, heavily implying that his wife leaving him is what triggered it.
Antisocial personality disorder
Just as we start to make up our minds about Jimmy, a new side of him is revealed that's incompatible with that judgment. The early part of the series tells the story of Jimmy becoming a lawyer after years of pulling small-time cons as “Slippin' Jimmy.”
“In the writers' room we were talking about Jimmy and his ups and downs. We talked about what he would get arrested for and we had this image of him getting drunk and taking revenge on some enemy by defecating through his sunroof. Because we knew he was living in Cicero, we dubbed it the Chicago sunroof.”
Jimmy has a pathological need to challenge the power structure. His thrill-seeking streak gets him in trouble time and again, hurting his loved ones either directly (like when he needs to be bailed out of jail) or indirectly (his limited income due to a suspended law licence, lost trust from deep, dark secrets).
Chuck evidently suffers from a condition called electromagnetic hypersensitivity. A rare condition in which exposure to electronic devices causes a range of unpleasant physical symptoms.
Saul flees not because he knows he'll be sued, but because he knows that he may lose either his life (when his former associates silence him) or his freedom (jail after prosecution) and he does not want to risk it.
Jimmy notices that his phone has run out of power. He stored it in Chuck's mailbox (one of the “perks” of living in Chuckland), and it was dead in the morning, so it must have been left on overnight – which he would never do.
On the show Better Call Saul, when someone enters Chuck's house, he asks. Ground yourself? By which he means to leave watches, mobile phones et cetera outside of the house. Also, he doesn't have anything electrical in his house.
Jimmy and Marco were close childhood friends, pulling scams as a dastardly duo. They relived the old days in Better Call Saul season 1, but Marco died shortly after. The deceased's mother then gave Jimmy her son's pinky ring as a token, and the lawyer still wears it during Breaking Bad.
As described previously, the king may have been afflicted with either manic episode or mixed or major depressive disorder with psychotic features. Thus, it is likely that the king suffered from bipolar I disorder.
Because Jimmy McGill decided to turn his court hearing into a therapy session, the deal he cooked up becomes obsolete. Rather than seven years playing golf, Jimmy gets 86 years at Montrose, which is the very prison he said he didn't want during the initial negotiation with the prosecution.
In 2010, after his association with Walter White's drug empire was revealed to the public, Saul was forced to retire from his law career, going into hiding in Omaha for several months, living as a fugitive under the alias of "Gene Takavic", a manager of a Cinnabon in Omaha.
Chuck is semi-reclusive and believes that he suffers from electromagnetic hypersensitivity. He was amicably divorced from Rebecca Bois, who was unaware of his EHS, a few years before the events of Better Call Saul.
Chuck thinks he's protecting the world from Jimmy, who he sees as a chimp with a machine gun. In his mind, everything - from blocking Jimmy's hire to going after Jimmy's license - is just the prudent use of his own skills to prevent greater harm.
Director Peter Gould's use of black and white to draw the viewer's eye and aid in the framing of his shots is spectacular. He reminds the viewer of classic black and white films while also underscoring and symbolizing Saul Goodman's journey out of darkness and toward the light.
He is sentenced to 86 years in prison, where he is revered by fellow inmates who recognize him as Saul. Kim is allowed to visit him under false pretenses and they share a cigarette. As she departs, he goes to the prison yard to see her off and gestures finger guns. Kim acknowledges the gesture and leaves.
In the end, Jimmy McGill unbroke bad. Just when it looked like Saul Goodman (Bob Odenkirk) had finessed his way into a sweet plea agreement — just seven years at the most country club-like of correctional facilities (low-security FCI Butner Low, which even has a golfing program!)
James Morgan "Jimmy " McGill, better known by his business name Saul Goodman, is a character created by Vince Gilligan and Peter Gould and portrayed by Bob Odenkirk in the television franchise Breaking Bad.
Patrick Fabian as Howard Hamlin in a promotional poster for Better Call Saul's fifth season. Initially a foil for and longtime antagonist of Jimmy McGill, his hostility and actions towards Jimmy are later revealed to have been largely due to pressure from Chuck McGill, his business partner and Jimmy's elder brother.
I came up with this idea that he should wear a double-breasted suit, because there is something showy about a double-breasted suit. A guy that wears a double-breasted suit, in my opinion, wants to be noticed. To make him stand out, what we decided is that nobody else on the show would ever wear a double-breasted suit.
Chuck (played by Spinal Tap's Michael McKean) is a recluse on extended leave from his legal firm who lives without electricity and wraps himself in a shiny “space blanket” to ward off the effects of exposure to Saul's mobile phone.
By examining the social and internal interactions of the character Walter White, it is clear that he could be clinically diagnosed with a narcissistic personality disorder.
While Chuck's condition is real in the sense that EHS is inspired by real life, it's certainly not real in the traditional sense. Like anti-vaccination and climate change being a hoax, EHS is the result of false information spreading and seizing advantage of those with existing psychological conditions.
The developer has stressed that Jimmy does not have Dissociative Identity Disorder (DID), formerly called Multiple Personality Disorder. The note about Jimmy and DID can be read on the game's main menu.
Ernesto covers for Jimmy by claiming that out of concern for Chuck's health, he called Jimmy before bringing Chuck to the copy store. Jimmy refuses to have Chuck committed to psychiatric care but takes temporary guardianship and allows an MRI and a CAT scan to determine whether he suffered head or neck injuries.