There is a reason we call it heartbreak

After a breakup, a betrayal, or the end of a close friendship, many people say the pain feels as much physical as emotional. The chest feels heavy. Food loses its appeal. Sleep comes in broken pieces. You might find yourself replaying conversations at 3 a.m., or feeling a jolt in your stomach when a song comes on.

This is not weakness, and it is not "all in your head." Strong emotions and the body are closely connected. Understanding that connection can make the experience a little less bewildering, and point to ways of looking after yourself while time does its work.

This article focuses mainly on the loss of a relationship. Grief after a death shares many of the same features, and the support suggestions here apply to it too.

What happens in the body after a loss

Close relationships become part of how we regulate ourselves. A partner's voice, routines together, and a sense of being cared for all help the nervous system feel safe. When that connection is suddenly gone, the brain treats it as a significant stressor. The body's stress response kicks in, releasing hormones such as cortisol and adrenaline. In the short term that can show up as:

• Tightness or heaviness in the chest
• A knot or churning feeling in the stomach
• Loss of appetite, or eating for comfort
• Trouble falling or staying asleep
• Restlessness, or feeling unusually tired
• Tension headaches and aching muscles
• Difficulty concentrating

Emotionally, people often move between sadness, anger, numbness, longing, relief and guilt, sometimes within the same hour. That mix is normal.

Broken heart syndrome: rare, but worth knowing about

In rare cases, intense emotional stress can trigger a temporary heart condition called stress cardiomyopathy, sometimes known as broken heart syndrome or takotsubo cardiomyopathy. Its symptoms, such as chest pain and shortness of breath, can look like a heart attack. It needs emergency assessment, and most people recover with care.

Getting through the first weeks

Early on, the aim is not to feel fine. It is to get through each day with basic needs met. Things many people find helpful:

• Keep a simple routine. Get up at roughly the same time, eat something small and regular, and step outside each day, even briefly.
• Move gently. A walk, stretching or light exercise can ease tension and help with sleep.
• Lower the volume on reminders. Muting or unfollowing on social media, and putting photos or gifts out of sight for now, can reduce painful jolts. You can decide later what to keep.
• Let feelings come without judging them. Crying, writing in a journal, or talking aloud can help emotions move through rather than build up.
• Lean on people you trust. You do not need to explain everything. Even sharing a meal or watching a movie together helps.
• Be careful with alcohol. It may seem to dull the pain, but it tends to worsen sleep and mood.
• Postpone big decisions where you can, until the fog lifts a little.

Rebuilding, little by little

After the sharpest pain eases, many people find it helps to gradually reconnect with parts of themselves that may have faded during the relationship, such as old friendships, hobbies, interests, or simple routines they enjoy. Some people find meaning in volunteering, learning something new, or making small changes to their living space. Reflection can come later: what you valued, what you needed, and what you would like next time.

There is no fixed timeline. Anniversaries, holidays or chance encounters can bring waves of grief back, even after you have been doing well. That does not mean you are back at the start.

When heartbreak needs more support

It is worth talking to a doctor, counselor or therapist if:

• You have not been able to eat or sleep properly for several days
• Low mood, hopelessness or numbness lasts for weeks and is not easing
• You are struggling to work, look after yourself, or care for others
• You are relying on alcohol or other substances to cope
• Anxiety or panic attacks have started or worsened
• The loss has stirred up past trauma

If you are having thoughts of suicide or self-harm, please reach out now. In the US, call or text 988 to reach the 988 Suicide & Crisis Lifeline, free and available 24 hours a day. Elsewhere, call your local emergency number. If you are in a relationship where you feel unsafe, a local domestic violence support line can help you plan.

Quiet signs you are moving forward

• Whole hours pass without thinking about it
• Waves of sadness come and go a little faster
• You laugh at something and enjoy it
• Your appetite and sleep start to settle
• You notice interest in plans for the future

Progress is usually uneven, and that is normal. Some people find it encouraging to jot down one small good moment each day. Over a few weeks, the list can show change that is hard to notice from the inside.

If you are supporting someone through heartbreak

You do not need perfect words. Checking in regularly, offering practical help such as a meal or a walk, and listening without rushing them toward "getting over it" are often what people remember most. If you are worried about their safety, gently ask, and help them connect with professional support.

Closing thoughts

Heartbreak can be felt throughout the body, from a tight chest to restless nights. Gentle routines, movement, support from others and patience help many people through. Chest pain or breathing trouble always deserves urgent care, and lasting low mood is a good reason to talk to a professional.

If stress is showing up as physical pain, our free Pain Check-Up can help you make sense of it. More support is available in the emotional and mental health groups.