1) Overload
These are the stims drown out everything else. Including:
• Hitting the head (against a hard surface or with objects)
• Biting or scratching the hands, arms, or other parts of the self
• Hitting oneself or throwing the self against hard surfaces
• Tearing or pulling at the hair
• Other extreme injurious behaviors that come on suddenly and forcefully
2) Bad Habits
These stims, while still unhealthy, are done in a more slow and controlled way. They may come on gradually and escalate, or may occur at low levels continually. Including:
• Biting, picking, or scraping at the finger or toe nails to the point of injury
• Dermatillomania and trichotillomania (skin picking and hair plucking, respectively)
• Self-harm behaviors such as cutting, burning, stabbing, etc.
• Biting or scratching the self at a continuous, low-grade level (e.g., chewing on the hands)
• Pica (eating non-food items, such as paper or tinfoil)
• Other dangerous or injurious behaviors that are done relatively calmly, either continuously, in all or most contexts, or under stress
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