Do Narcissists Self-Harm?

Honestly too many. Both the grandiose who use it to manipulate and the vulnerable who use it to self-regulate, I also saw the malignant who used it to scene someone with a crime they didn't commit... All in one family, I am the scapegoat of.
I saw less normal (personality-wise) people self-harming than narcissists, and imho narcissists are more prone to self-harm after a traumatic past that non-narcissists would make it out of without self-harm, like they aren't emotionally resilient.
I'm a (luckily) non-narcissistic member of two narcissistic dynasties, am a scapegoat and saw all kinds of severe&repeated abuse including sexual abuse at 2 y/o, routine neglect, bullying, traffic accidents, murder attempts, trauma was my daily life. I am suffering from DID and c-PTSD, yet I don't self harm as much as my golden sisters who were put on a pedestal and treated like treasures do. Normally I would be more likely to self-harm, CSA, dissociation, PTSD... But my golden sister, who is a full-blown grandiose narcissist now with no history of "typical" abuse and neglect, used to cut herself bc her teacher didn't pay "enough" attention to her at class that week... The enough here being not focusing solely on her and stuff.
Like that's all it got for her to injure herself. It was so weird seeing someone so full of herself going so far to hurt herself at the same time.
My malignant NPDd mom, who got diagnosed after her scapegoat (me) left and she collapsed, multiple times used suicide as a weapon, and projected even that trait on me when I was suffering from suicidal thoughts during a major depressive episode, saying I was just manipulating her, wasn't seriously suicidal and guilt-tripping them to take care of me.
Everything comes after their egos, your health, their health, your life, even their own lives sometimes. The holy ego is everything. And we are all nothings in its disposal.

I am married to a man that has a lot of childhood trauma. We have been married 6 yrs., together for 8 yrs. It is difficult to figure out. I feel like it is a mixture of BPD, NPD, bipolar, DID. I am at my white end. He loves me to the point of being obsessed but then hates me sometimes and accuses/threatens. There is no middle ground. It is a constant mind game. Trying to exit smoothly. Fearing he might stalk me.

Yes... my narc bf has used self harm to manipulate me. The first time was in bed and I was falling asleep... he didn't like that... I was supposed to be up and paying attention to him. You can't go to bed until he says so, after all. I heard him saying "Oh man, that feels good..." and I opened my eyes to see him burning his own arm with a cigarette. He did this multiple times in our relationship.
In one of his past relationships he severely burned himself with a red hot fork in order to manipulate his ex. He said he intended to burn her but at the last moment decided to burn himself. Very sick.

My NPD ex-husband would chew and pick at his nails until they only covered half of the nail bed they are supposed to cover. It was painful just to look at his fingers. He would do it until he would make himself bleed. When I confronted him about it and offered to look into ways to help him stop, he looked at me with angry, lifeless eyes and said slowly and deliberately, “I like the pain.” I left a month later after a 12 year relationship that had advanced to physical abuse after years of emotional abuse, manipulation, and control. I never looked back.

I'm a vulnerable narcissist (comorbid with BPD, OCD and others) and I have been cutting myself on and off for about 10 years (since I was ~16).
It feels a bit hurtful of you to assume we're doing this to manipulate others. I feel a great deal of guilt, whenever I feel like I do something like this for "attention", though I really only do that when I'm at my absolute wit's end. Oftentimes, I do it when I'm alone, it has to do with the tremendous emotional pain and internalized feelings of my emotions not being valid.
I would NEVER cut myself to intentionally manipulate anyone. If I end up doing that, it's really an inevitable consequence of the tremendous emotional pain, and I always try to put it away as much as I possibly can, as hurting others just isn't something, I take enjoyment in.

I’ve been in two relationships wherein I would be hurt or upset about something and I’d see this shocking, red fury flash across their faces and they’d start hitting themselves repeatedly. I did it once, too, in one of these relationships. I will ever do it again.

Yes, Mine was diagnosed with depression which requires medication (prozac). I had two opportunities to leave, once in couples therapy and another when I almost filed for divorce 11 years ago. Of course, I was love bombed and hoovered the first time I wanted to get a divorce. I put her self-centredness to narcissism, but I hadn't heard of pathological narcissism until recently. She drinks alcohol even though medicated with Prozac, which is a no-no. I confronted her about this several times. I think this combination clouded her judgment to the extent that she amputated the tip of a finger.
Anyway, somehow the topic of recreational marijuana came up and my wife said, "I hope that our state adopts this because I want to sit by the pool and get a buzz." Then she confesses to using recreational marijuana at least once. I have to admit I think she has probably done it more times than just once.
Just marijuana and prozac are a bad combination, which my wife who had worked in the pharmaceutical industry should have known. When I told my lawyer who is filing my divorce that she mixed alcohol and Prozac. And he interrupted to say, “alcohol, Prozac, and marijuana are a bad combination.” And I hadn’t even mentioned the marijuana at that point.

I had one that would hurt his self when he made up stories that made it seem like he saved the day. He made up a story that someone broke in his garage, they fought, and he beat the guy up and knocked him out, and he called the police. It was weird and creepy, because I didn’t see no police.

My boyfriend just committed suicide this past Sunday. He was a vulnerable narc. He suffered a narc collapse and took his own life with his gun.