1. Emergency rescue: If he is found to be hurting himself, he should immediately call the emergency number or seek professional help. You can ask a doctor to evaluate their health status and provide corresponding treatment suggestions.
2. Calm down: Don't blame or criticize him in an emergency, which may aggravate his problems. You can accompany him, give him comfort and support, and make him feel safe and protected.
3. Provide information: Tell your friends, family or others about your experiences and feelings after breaking up with him. Let them know what problems he is experiencing so that they can provide support and understanding.
4. Contact a counselor: If the situation continues to deteriorate and cannot be alleviated by the above measures, you can consider seeking the help of a counselor. They can help you understand the root causes of problems and solutions, and provide corresponding support and solutions.
In short, when a boyfriend has self-harm behavior, the most important thing is to take action as soon as possible to stabilize his mood and ensure his safety and health.