If you've noticed marks on a student's arm, a hoodie that never comes off in warm weather, or a friend who quietly told you "I think she's cutting," here is the short answer: stay calm, talk to the student privately and directly, never promise to keep it secret, and refer them to your school counselor or support team the same day. You are not expected to assess, treat, or investigate anything. You're expected to notice, respond with care, and hand off.
The rest of this article is the longer version — what self-harm actually is, what to say, what not to say, and where your job ends.
First, what self-harm is (and isn't)
Self-harm — clinicians call it non-suicidal self-injury — means deliberately hurting your own body to manage emotional pain. Cutting is the most familiar form; scratching, burning, hitting, and picking are common too.
It is far more common than most adults realize. A 2022 meta-analysis of 62 studies covering more than 264,000 adolescents found that roughly 22% reported self-injury at some point. In a middle or high school, that's not a rare student. It's several in every grade.
For the student, it works — and that's the hardest part to accept. Physical pain interrupts emotional pain that feels unbearable and unnameable. It's a coping strategy. A dangerous, harmful one that signals real distress, but a strategy, not a performance.
Three beliefs get in the way of helping:
- "It's for attention." Most students hide self-harm carefully, sometimes for years. A student who lets it be seen is signaling need in the only language they have. That deserves attention, not dismissal.
- "It means they're suicidal." Self-harm and suicidal intent are different things. Most students who self-harm are trying to cope with life, not leave it. But the two overlap enough that a trained person needs to ask the question — which is one reason referral isn't optional.
- "If I bring it up, I'll make it worse." The research on this is clear. A 2020 systematic review and meta-analysis found that asking about suicide and self-harm did not increase self-injury, suicidal behavior, or distress. Calm, private conversation doesn't spread self-harm. Detail does — methods, images, public drama. Talk about feelings and support freely; never about technique.
What you might notice
None of these alone means anything. Two or three together, or one clear sighting of unexplained injuries, is enough to act on.
- Long sleeves or hoodies in warm weather, refusing to change for gym, wristbands that never come off
- Cuts, burns, or scratches in patterns — often forearms, thighs, hips — with explanations that don't fit
- A drop in mood, withdrawal from friends, or a friend group where self-harm is known to be present
- Blood spots on sleeves or tissues, pencil sharpeners taken apart, first-aid supplies going missing
- Writing or art that keeps returning to pain, punishment, or hurting
Acting never means investigating. You will not ask to see anything, examine anything, or collect evidence. You'll have one caring conversation, and you'll refer.
How to have the conversation
Set it up privately. "Can you hang back a minute after class?" Never in front of peers, never in the hallway, never by mentioning their body where anyone can hear.
Then follow a simple shape: observe, care, ask, listen.
Name what you've noticed, without accusation: "I've noticed you've seemed really down lately, and I saw the marks on your arm. I'm not upset with you — I'm checking in because I care about you."
Ask directly: "Are you hurting yourself?" Direct beats vague. Teenagers can tell when an adult is circling a subject, and vagueness reads as your discomfort — which teaches them to protect you from the truth.
Then stop talking. Whatever comes — silence, tears, denial, anger, or the truth — listen without flinching.
Your face is half the conversation. Students who self-harm usually carry heavy shame. What they're scanning for, the whole time, is your reaction. Shock, disgust, or panic confirms they're "too much," and the wall goes up for the next adult too. You're allowed to feel shaken. You're not allowed to show horror at the student. Steady voice, soft face, no gasp.
The one mistake you can't undo
"Promise you won't tell anyone."
It's coming, so be ready. Agreeing is the single unrecoverable mistake. You can't keep this secret, and pretending you can will cost the relationship far more when the truth comes out.
Honesty holds up better than adults fear:
"I can't promise that, because I care about you too much to handle this alone. What I can promise is that I'll be with you in it — we'll go talk to [counselor's name] together, and I won't disappear on you."
Students accept this. What they cannot accept is betrayal dressed as a promise.
If they deny it, don't push, don't cross-examine, don't ask to see. "Okay. I'm not going to push you. I want you to know I'm here, and I care about you no matter what." Then refer anyway. You don't need a confession — a denial changes nothing about what you saw. The conversation still succeeded: they now know one adult noticed, stayed calm, and didn't look away.
What happens next: refer the same day
Go to your school counselor, psychologist, or student support team before you leave the building. Self-harm doesn't wait for a convenient moment. If your school has a referral form, use it and speak to a person — paper alone is how these fall through cracks.
The best version is a warm handoff: walk with the student, introduce them yourself, and let them see two adults in their corner meet.
Report observations, not conclusions. "Three parallel healing cuts on the left forearm, hoodie in 85-degree weather since March, said 'it helps me feel something'" is useful. "She's a cutter" is not. Write a brief factual note for yourself the same day: date, what you observed, who you told.
Where your job ends:
- You don't assess severity or risk — that's a clinical evaluation
- You don't ask to see injuries, photograph anything, or search belongings
- You don't build a safety plan or make the student promise to stop
- You don't call parents yourself — how and when family is told is the counselor's call, made with training you aren't expected to have. Done wrong, it can make home less safe.
- You don't sit on it "to see how next week goes"
Two things change the tempo. If the student says anything about wanting to die, or you suspect the injuries reflect suicidal intent, that's your school's crisis protocol, right now — and the student isn't left alone. The 988 Suicide & Crisis Lifeline is available by call or text, 24 hours a day. When in doubt, treat it as the crisis lane; the cost of over-calling is minutes.
And if anything suggests the injuries were caused by someone else, or abuse sits anywhere in the picture, you are a mandated reporter. In Delaware, that's a call to the Child Abuse & Neglect Report Line at 1-800-292-9582, answered 24 hours a day, or a report online at iseethesigns.delaware.gov. Reasonable suspicion is the threshold. Investigating is not your job, and good-faith reporters are protected by law. Outside Delaware, your state has an equivalent line — know it before you need it.
After the referral: you're not done, you're just their teacher again
Monday morning, the student will walk in knowing you know. They'll test the air: is this teacher different with me now? Watching me? Sorry for me? Any of those confirms that telling an adult changes how adults see you — a lesson with a long shelf life.
What works is ordinary warmth, unchanged. Same greeting, same standards, same jokes. Once, privately: "I'm glad you're getting support. Nothing's different between us." Then let your behavior prove it.
Keep your eyes open and your hands off. Notice mood, attendance, the same signs as before — and route anything new to the counselor rather than reopening it yourself. Don't check their arms or ask how "stopping" is going. Recovery isn't linear, a new mark isn't a failure, and surveillance reads as exactly that.
Two situations that come up more than you'd think
A friend tells you. "I think Maya is cutting" is one of the most important disclosures you'll ever receive. Take it exactly as seriously as seeing it yourself. Thank them specifically — "telling an adult was the right thing, and it was brave" — and refer the same day. The friend needs relief from the secret-keeping job they've been doing alone, and the same no-secrets honesty.
More than one student. Self-harm can cluster socially in middle and high school. If you're seeing signs in connected students, tell the counselor that pattern explicitly. It changes the response from individual to group.
What this does to you
Seeing a child's self-inflicted injuries stays with you. Many teachers replay the conversation for weeks and check that student's seat first every morning. That's a normal response to something genuinely hard. Debrief with the counselor — about you, not just the student. If it keeps riding home with you, that's a reason to talk to someone, not a weakness.
If you want the full version
Everything above comes from When You're Worried About Self-Harm, a free four-module course for middle and high school staff in the CCD Educator Portal. It goes deeper on each step, with scenarios where you choose a response and see what it costs. You can read it without creating an account.
The Center for Child Development provides school-based mental health care in close to 140 Delaware schools. This article is educational and does not replace your district's crisis protocol, clinical judgment, or emergency services. If a student is in immediate danger, call 911.