# How to Tell Your Partner About Your STI
Being diagnosed with a sexually transmitted infection (STI) can bring a wave of feelings — shock, embarrassment, worry, sometimes anger. On top of that comes a question that many people find harder than the diagnosis itself: *how do I tell my partner?* This guide walks you through it calmly and practically. STIs are extremely common, most are easily treated, and telling a partner — while rarely comfortable — is a normal, responsible thing that millions of people do every year. You are not a bad person for having an infection, and you are doing the right thing by finding out how to handle it well.
The short version
If you're short on time, here's the essence: - **Yes, you should tell** any partner who may have been exposed, so they can test and treat. It protects their health and stops the infection bouncing back to you. - **Tell them soon** — ideally before you have sex again, and before complications have time to develop on their side. - **Keep it simple, factual and kind.** State the infection, that they may have been exposed, and that they should get tested. You don't owe your whole sexual history. - **You have options.** You can tell them face to face, by phone, or — if that isn't safe or possible — through an anonymous notification service or your sexual health clinic, which can notify partners without naming you. - **Get the facts first** from your clinic, including exactly which past partners to notify. The rest of this article covers each of these in depth.
Why telling a partner matters
Partner notification — letting sexual partners know they may have been exposed so they can get tested and treated — is one of the most effective tools in sexual health. It matters for three reasons. **Their health.** Many STIs, including chlamydia, gonorrhoea and syphilis, often cause no symptoms at all. A partner may feel completely fine while an untreated infection quietly causes harm — in some cases pelvic inflammatory disease, infertility, or complications in pregnancy. Telling them gives them the chance to act before that happens. **Your health.** If you're treated but your partner isn't, having sex again can simply re-infect you with the same organism — a cycle sometimes called the "ping-pong effect." This is common enough with chlamydia and gonorrhoea that a repeat test a few months after treatment is often recommended. Notifying partners breaks the loop. **Everyone's health.** STIs move through networks of people, not isolated couples. A single conversation can stop a chain of onward transmission you'd never otherwise see. Most people, when told respectfully and given clear information, are far more understanding than you expect — and often grateful to know.
First, look after yourself and get the facts
Before you talk to anyone, give yourself a moment and gather accurate information from your clinic or the service that diagnosed you. Knowing the facts makes the conversation far easier and calmer. Ask your clinician: - **Exactly what you've been diagnosed with**, and whether it's curable (like chlamydia, gonorrhoea, syphilis or trichomoniasis, which are treated with antibiotics) or a manageable lifelong condition (like herpes, HIV or some HPV). - **Which partners you need to notify.** Clinics use "look-back periods" — how far back to reach out — and these vary by infection. As a rough guide, recent partners over the last few months are usually included for chlamydia and gonorrhoea, while syphilis and HIV can require a longer window depending on the stage. Your clinic will give you the precise timeframe for your diagnosis, so ask rather than guessing. - **What treatment your partner will need**, and whether they can be treated quickly. In some places, doctors can provide treatment or a prescription for a partner without seeing them first (known as expedited partner therapy) for certain infections — your clinic can tell you if this applies where you live. - **What support the clinic offers** with notification, including notifying partners on your behalf. You don't have to carry this alone. Sexual health clinics do this every day, without judgment, and can coach you through it.
Who to tell, and when
**Who:** Any partner who falls within the look-back period your clinic gives you. That can include a current partner, recent casual partners, and sometimes partners further back. If you're unsure whether someone counts, your clinic can help you decide. **When:** As soon as you reasonably can. Two timing principles help: - **Before you have sex again** with a current partner, so they can be tested and treated and you avoid re-infection. - **Promptly for past partners**, because the sooner they know, the sooner they can prevent complications and avoid passing it on. You don't need to wait for a "perfect moment." Sooner and simpler almost always beats later and elaborate.
How to have the conversation
There's no single script that fits everyone, but a few principles consistently make these conversations go better. **Choose a calm, private setting.** For a current partner, an unhurried moment where you won't be overheard or interrupted is ideal. Face to face is generally kindest for someone you're close to — but a phone call is a perfectly reasonable alternative, and for casual or past partners a text or an anonymous service is completely appropriate. **Lead with the facts, not with apology or drama.** You're sharing health information, not confessing a crime. A steady, matter-of-fact tone helps the other person stay steady too. **Keep it brief and clear.** Say what the infection is, that they may have been exposed, and that they should get tested (and treated if needed). That's the core message. You do not owe a detailed account of your sexual history, and you're not obliged to work out or explain "who gave it to whom" — with many STIs that's genuinely impossible to know. **Give them somewhere to go.** Pointing them to a local sexual health clinic or testing service turns worry into a clear next step. **Expect to give them a moment.** People often need a beat to absorb the news before they respond. Silence isn't rejection. ### Example scripts Adapt these to your own voice: - **Current partner, in person:** > "I want to tell you something important. I got tested and found out I have [infection]. It's [treatable / very common], and because we've been together you should get checked too so you can be treated if you need it. I can help you find a clinic." - **Recent partner, by phone or message:** > "Hi — this is a bit awkward, but I'd want to know if it were me. I've recently tested positive for [infection], and since we were together it's worth you getting tested. Most clinics can sort it quickly. Happy to share where to go." - **If you'd rather not name the infection over text:** > "Hi, I recently had an STI test come back positive. As someone I've been with, it's a good idea to get tested — clinics can advise you. I wanted you to have the heads-up."
If you'd rather not tell them directly
Telling someone yourself isn't the only responsible option — and for casual partners, exes you've lost touch with, or situations where a direct conversation feels unsafe, it may not be the best one. The goal is that partners get notified, not that you personally deliver the news. **Provider (clinic) referral.** Your sexual health clinic can contact partners on your behalf and inform them of possible exposure *without revealing your identity*. Health workers do this routinely and confidentially. This is often the best route for HIV and syphilis, and whenever you want to stay anonymous. **Anonymous notification services.** A number of free tools let you send an anonymous text or email alerting a partner that they may have been exposed and should get tested — examples include TellYourPartner, STI notice, and clinic-linked tools such as SXT. Some clinics offer their own versions. These send a discreet message without linking it to your name. Used honestly — to inform and protect, not to harass — they're a legitimate, widely used option. Whichever route you choose, notifying is always better than staying silent.
Handling their reaction
You can control how you deliver the news; you can't control how someone receives it. Most reactions are calmer than people fear, but prepare yourself for a range. - **Calm or grateful** — the most common response. They appreciate being told. - **Upset or scared** — usually about their own health, not about you. Give them space and point them to testing. - **Angry or blaming** — try not to absorb it or argue about origins. With many STIs it's impossible to know who transmitted what, or when. Restate the practical point: getting tested is what protects them now. You are responsible for telling them honestly and kindly. You are not responsible for managing every emotion they have afterwards.
Your safety comes first
If you have any reason to believe that contacting a partner could put you at risk — for example in a relationship involving abuse, control or coercion — **do not attempt to contact them directly.** Tell your clinic. They can arrange notification through their own confidential channels without your involvement and without exposing you to harm. Your safety takes priority, and clinic staff are experienced in handling exactly these situations.
Specific situations
**A long-term partner.** Alongside the health facts, there may be relationship questions to navigate — including how the infection came to be present, which isn't always a sign of anything, since some infections can be carried undetected for a long time. Focus first on both getting tested and treated; the relationship conversation can follow once the practical steps are underway. **Herpes (HSV) and HPV.** These are so common that most sexually active people encounter them at some point, and both are lifelong to varying degrees rather than "cured." Disclosure here is about giving a partner informed choice and discussing how to reduce transmission, rather than urgent treatment. A clinic can help you frame this accurately and without shame. **HIV.** Modern treatment is transformative: someone on effective treatment with an undetectable viral load cannot pass HIV on to sexual partners — often summarised as **U=U (Undetectable = Untransmittable)**. Notification and disclosure are still important, and clinics provide strong, confidential support with partner notification for HIV. Because disclosure can also carry legal dimensions in some places (see below), it's worth getting clinic and, if relevant, legal guidance.
A note on the law
Rules around disclosing an STI to a partner vary widely between countries and regions, and are strictest and most complex around HIV, where non-disclosure is treated as a criminal matter in some jurisdictions and not in others. This article is general health information, not legal advice. If you're concerned about the legal side of disclosure — particularly with HIV — ask your clinic and, where appropriate, seek advice specific to where you live.
After the conversation
Telling your partner is a step, not the finish line. To close the loop: - **Make sure they actually get tested and, if needed, treated.** Sharing a clinic link or, where available, arranging partner treatment through your own clinic helps. - **Avoid sex until you're both clear.** For treatable infections, that usually means finishing treatment and waiting the period your clinic advises before having sex again — otherwise you risk re-infecting each other. - **Consider a repeat test.** A follow-up test a few months on is often recommended for chlamydia and gonorrhoea to catch any re-infection.
Looking after your own wellbeing
An STI diagnosis can stir up shame, especially given how much stigma still surrounds these infections. That stigma is not a reflection of reality: STIs are a normal part of human health, they say nothing about your worth, and having one puts you in very large company. Be as kind to yourself as you would be to a friend in the same position. If the diagnosis is weighing on you emotionally, sexual health clinics often have advisors or counsellors who can help, and talking it through with someone you trust can lighten the load. Handling this responsibly — as you're doing right now — is something to feel good about, not ashamed of.
When to get professional support
Reach out to a sexual health clinic or healthcare professional if you: - Aren't sure which partners to notify or how far back to go. - Want partners notified anonymously or on your behalf. - Feel unsafe contacting a partner. - Have questions about treatment, re-testing, or a specific infection. - Are finding the emotional side hard to cope with. They do this work every day, confidentially and without judgment.
Frequently asked questions
**Do I legally have to tell my partner I have an STI?** It depends where you live and which infection you have. Legal obligations are most significant around HIV in certain jurisdictions and vary elsewhere. Regardless of the law, telling partners is the recommended and responsible thing to do so they can protect their health. For legal specifics, seek advice for your own area. **How do I tell my partner about an STI anonymously?** You have two main options: ask your sexual health clinic to notify partners on your behalf without naming you (provider referral), or use an anonymous notification service that sends a discreet text or email prompting them to get tested. Both are legitimate and widely used. **Should I tell a partner by text or in person?** For a current or long-term partner, in person or by phone is usually kinder. For casual or past partners, a text or an anonymous service is completely appropriate. What matters most is that they're told — the method is secondary. **How far back do I need to notify partners?** It depends on the infection. Recent partners over the past few months are typically included for chlamydia and gonorrhoea, while syphilis and HIV may require a longer look-back window depending on the stage. Your clinic will give you the exact timeframe for your diagnosis. **What if my partner reacts badly?** Some strong emotion is understandable, but it's usually driven by worry about their own health. Stay calm, avoid arguing about who "caused" it, and steer the conversation toward the practical step of getting tested. You're responsible for telling them honestly — not for controlling their reaction. **Can we get back together / have sex again?** For treatable infections, yes — once you've both completed treatment and waited the period your clinic advises. Having sex before that risks passing the infection back and forth. --- ### About this article *This article provides general information about sexual health and partner notification. It is not a substitute for personalised medical advice. If you've been diagnosed with an STI, speak to a sexual health clinic or healthcare professional for guidance specific to your situation.* *Information reflects general guidance from bodies including the British Association for Sexual Health and HIV (BASHH), the World Health Organization (WHO), the US Centers for Disease Control and Prevention (CDC), and the NHS. Clinical pathways, look-back periods, partner-treatment options and legal obligations vary by country and region — always confirm details with a local service.* *Medically reviewed by [reviewing clinician — name, credentials, registration number]. Last updated 14 July 2026.*