Several times throughout the series, it is mentioned that Howard's father left him and his mother when he was young. It's a traumatic memory for Howard and features in many episodes.
Characters frequently lie to get out of someone being mad at them or to get something they want. Though I wouldn't call it gaslighting because it's never a case of trying to make someone doubt their perception of reality, the characters can be very manipulative in their lying sometimes, so it could still be a trigger for some.
In S6 E10 "The Fish Guts Displacement" Sheldon spanks Amy. While it is implied that she secretly enjoys this, he does this to her under the impression that it is non-consensual or at least not wanted.
one of the main characters frequently tries to flirt, and in one episode, he tries getting a robot to look up a womans skirt, many times played for laughs
Penny dislocates her shoulder after falling in the shower, we don't see this happen and the injury is not realistic at all. However, most of the episode is about this injury
Characters walking up and down stairs is a common theme in the series. Characters are not actually shown falling down the stairs, but the sounds of characters falling down the stairs can be heard off-screen a couple times in the series.
leonard also made out with someone while he was in a relationship with priya, and when he calls her to tell her she reveals that she slept with someone else
In four episodes. Season 6 episode 7, sound and retching, no vomit is shown. You get a fair warning to turn off sound before. Twice in season 11 episode 11, sounds and retching but you see it coming to turn off the sound. Season 12 episode 16, right after William Shatner shakes Sheldon's hand, only sound. Season 12 episode 24, 16 minutes in. Only sounds
Maybe not technically since the character is never specifically confirmed to be bisexual and the flirting is played for jokes, but Amy often has a (creepy and unrequited) attraction to Penny that goes beyond friendship, even though she is dating Sheldon.
Yes, multiple times throughout the film, but no gore or surgery is showed. They just show a waiting room, and once or twice a hospital room. There is a scene or two where a character is in an isolated room because they might’ve been exposed to a bacteria, but yet again, no gore.
There is no actual ABA therapy but in one episode Amy tries to "train" Sheldon out of one of his autistic traits (having intense trouble with lack of closure / resolution), and she uses similar methods
sheldon has claustrophobia and goes in the university steam pipe tunnels and gets very scared, he can get out at any moment though and got in voluntarily, i dont know if that helps. they also play dungeons and dragons and at one point leonard describes how the walls are closing in on them.
Sheldon is autism-coded (he isn't confirmed to have autism, but it is obvious that he does). I don't think it's misrepresented, though. I have autism and I am very similar to Sheldon.
Sheldon’s friends constantly make fun of autistic traits he displays. A cast member has said the majority of the main characters are neurodivergent in some way, and since it is a sitcom, all of them are mocked for their personalities and quirks often.
Nearly all jokes revolve around racist and antisemitic stereotypes, especially of Raj, Howard, and their families. Constant sexism, homophobia, and transphobia.
Characters constantly make fun of Sheldon's lack of sexual attraction to anyone throughout the series. Amy, Sheldon's girlfriend, constantly complains how he won't have sex with her.
Raj's friends consistently refer to him as a woman, as well as making jokes about Penny's "mannish" features. A character once says he's glad he doesn't have to wonder if Penny is "really a man down there". A trans woman used to live across the hall from Leonard and Sheldon that they both refer to as a man.
An episode's plot revolves around Sheldon and Kripke fighting for an office after a minor character at the university is forced to retire due to his advanced dementia. He appears briefly in the episode and behaves in a way consistent with dementia (or at least the way a TV show depicts it).
In a episode where the characters wonder where'd they'd all be if they never met Sheldon, there is an imaginary scenario where Leonard and Raj are living together and are fat. Stuart inserts himself into the fantasy, also fat. The actors are shown in fat suits.