my son has gone through periods of this.............self-harm is a broad category. for instance, my hubby , who's an aspie, like to hit his knee repeatedly with the head of a hammer~ he doesn't do it very hard, but he says he likes the sensory input. My son, when anxious, will draw on himself so hard that it will leave marks. he's also cut himself to relieve anxiety . thankfully, he doesn't cut himself anymore