Trachiectomies are often performed, but in a medical setting. If I remember correctly, this never causes permanent damage, but could still be triggering for some.
Several discussions about abortion (i.e., Dr House attempting to convince patients to terminate their pregnancies and arguing about whether it’s “murder”)
It isn't a too prevalent theme, but there are a few times when it can be a major trigger for some people, especially with discussions and actions regarding the possibility of afterlife in S4E3.
Vague spoilers: it is implied that House's father was abusive towards him. Whether you can attribute all of House's abusive actions to that is debatable, but it's something to be aware of
While House is typically accused of being a drug addict, he is also an alcoholic. He is often observed drinking Scotch at bars, his own apartment, and work.
S5, E4, Birthmarks, the patient is an alcoholic. S5, E15, Unfaithful, the patient is accused of being an alcoholic. There are several others, but these are the most notable in my memory.
I'd avoid the show if people chronically using alcohol is an issue for you.
House uses Vicodin, some patients use alcohol, marijuana, Vicodin, heroin, or cocaine. Cameron is once observed taking crystal meth, and Thirteen takes drugs at one point.
Drug use is prevalent throughout the show. If drugs or addiction is a problem for you, I wouldn't watch the show.
Steve McQueen is House's rat, which House does really care for. Unfortunately, House does end up having to use Steve for an experiment, which involves killing him. Not necessarily abuse, but could be seen as mistreatment. (Euphoria Part 2, season 2, episode 21)
Dog dies in 97 Seconds due to drug intake. Lab rats die and are shown being experimented on in a few episodes (Euphoria Part 2, Informed Consent, The Fix). A dead cat is experimented on in Detox.
Swarms of bugs occur in Detox (S1, E11), Dying Changes Everything (S5, E1), and Massage Therapy (S7, E4). Mild bugs every so often throughout the show.
Throughout the show, psychotic patients are restrained by staff.
In S2, E24, No Reason, House is restrained to his bed. In S6, E1, Broken, House is restrained to his bed. In S7, E22, After Hours, the patient is handcuffed to her bed.
Many tests are performed on eyes, some of which show needles being placed into the eyes. There is no blood, and it is all performed in a surgical setting with no lasting trauma to the eye.
In S2, E24, No Reason, the patients eye pops out. It's really gross.
A main character comes very close in the last episode of S8, and it is implied that their cause of death is burning alive, but it is later proved false.
In S3, E11, Words and Deeds, a firefighter presents with skin grafts due to being burnt in the past.
House shaves his face a few times. Most notable is S5, E16, The Softer Side, where he shaves his face in his bathroom.
As for cutting, some patients do self harm, but none are shown in the act, and no bloody or bleeding cuts are shown (some are shown scabbed or fully healed).
A main character cuts themself in S3, E10, Merry Little Christmas. The cutting is not shown, but the cuts are shown while bloody or bleeding.
A teenage model is extremely sexualized. Another teenage girl stalks Dr. House because some fungi pores in her brain make her attracted to him, and there are many sexualized shots of her. Dr House is pretty known for having the worst bedside manner on earth, and treats various minors where he asks them about their sexual health rather crudely. (Pregnant 12-year-old, a teenager trying to get birth control, and various others)
s6e16 "Lockdown": the hospital is put on lockdown as an infant is missing. it is a major plot throughout the episode. in the end, the baby is found safe and was taken by accident and without malicious intent
Vomiting is very prevalent throughout house, however there is a helpful guide I found (I thought I had found it here, but it doesn't seem to be here anymore).
Yes, there was an episode with that one autistic kid with the worms and i guess he was at least a little bit abused (or mishandled) by his parents because of his autism. This includes things like screaming at him, making him do things he doesn't want to etc.
House refers to himself and other disabled people with the c-word all the time. There are many prejudices towards disabled characters, whether that comes from the characters or the showmakers isn't clear. The value of disabled lives is often questioned, almost always by a led characters.
House is a jerk to everyone, including Jewish people. Since Taub is a main character who is Jewish, antisemitism does come up. I believe Cuddy and Wilson are also Jewish, if my memory serves me correctly. Most antisemitic comments are focused on Taub's nose.
One episode centres around a teenaged patient who initiated sex with her father. Another episode involves two patients who are unwittingly engaged in a relationship, not knowing they’re half siblings. There are various other minor examples.
House has sexual relationships with his girlfriends and his wife, and lots of hookers. Chase has tons of sex with women. Thirteen has some sexual relationships, as does Foreman, Taub, Cameron, and even Park.