Why Do I Lose My Appetite When I'm Sad? What a Heavy Heart Does to Your Gut

The phone call came just after lunch. Maybe it was a diagnosis in the family, a relationship ending, or a friend who won't be around much longer. You got through the afternoon somehow. Now it's seven o'clock, you've made yourself a bowl of soup because that's what you're supposed to do, and it's sitting there going cold.

You're not full. You're not hungry either. Your stomach feels closed, as if someone put a lid on it. Nothing you ate today has changed. Something in you has.

If you already live with a touchy gut, whether that's IBS, Crohn's, colitis or a stomach that simply reacts to life, this can be unsettling. Is it the sadness? Is it the gut? This post is about that question, and about the part of it that starts in the mind.

Your Gut and Your Mood Are on the Same Line

It can feel strange that grief lands in your stomach. But the gut and the brain are not separate departments. Crohn's & Colitis UK describes the gut-brain axis as a direct two-way link between the gut and the brain, with the two communicating through nerve signals, hormones and other chemicals produced by your brain or gut. The same guide is honest that it's not clear exactly how this link works.

What it does mean is that a heavy heart and a closed stomach are worth looking at together, rather than as two unrelated problems.

What Low Mood Can Do to Hunger

There is research on this, though it looks at depression, which is more than an ordinary sad day. A 2016 brain-imaging study compared depressed people whose appetite had gone up, depressed people whose appetite had gone down, and healthy volunteers while they looked at pictures of food. In the people who had lost their appetite, a region called the mid-insula was less active. The authors describe that region as one that supports monitoring the body's physiological state.

Put simply: in that study, low appetite went with a quieter response in a part of the brain that helps read what the body needs. It was one study, and it doesn't prove what happens in your own kitchen.

The same study is also a reminder that it doesn't go one way for everyone. Some of the depressed participants had increased appetite instead. If sadness sends you to the biscuit tin rather than away from the table, that is the other side of the same coin, not a failing.

The Sadness You Haven't Put Down

Sometimes you know exactly what happened today. Other times the appetite goes and you can't say why. Either way, it's worth asking what you've been carrying and not letting yourself feel.

Imagine Lina, who has had IBS for years. Her father died last spring. She went back to work after a week, kept busy, and told everyone she was fine. Months later she notices that on some evenings she simply can't eat. Nothing about her food has changed. What those evenings have in common is that they're the quiet ones, when there's nothing left to keep busy with and the grief she has been holding at arm's length comes back into the room.

If you live with a gut condition, low mood may already be a familiar visitor. Crohn's & Colitis UK says people with Crohn's or Colitis are at greater risk of mental health problems like stress, anxiety, and depression than the general population, and that people with both can end up in a cycle, with each one making the other worse. For IBS, the NHS lists stress and anxiety among the things that can trigger a flare-up.

Why Skipping Meals Can Become Its Own Problem

One missed dinner on a terrible day is human. The trouble starts when it quietly becomes a pattern. Crohn's & Colitis UK notes that the challenges food brings can lead to binge eating, skipping meals, or restricting food, which means you may risk not getting enough nutrients from food, which can complicate your condition. If you have Crohn's or colitis and notice your eating shrinking, they suggest talking to your IBD team, who may be able to refer you to a dietitian.

What Can Help

Start with the feeling, not the food. Then let food be the gentle support.

• Talk about it. Crohn's & Colitis UK says talking can help to process things and give you a fresh perspective, whether that's with a friend, family member or a trained counsellor.
• Write it down. The same guide suggests keeping notes of how you feel, which may help you to spot patterns. Lina might find that her quiet evenings are the ones to plan for.
• Find time to relax. Relaxation techniques may help to reduce anxiety, pain and stress levels and improve your mood if you have Crohn's or Colitis.
• Ask for proper support. Crohn's & Colitis UK says talking therapies and medicines for depression and anxiety can help to improve mental health. With IBS, the NHS says a talking therapy such as CBT can help if stress or anxiety is triggering your symptoms, and can also help you cope with your condition better.
• Keep food small and kind. On the heavy days, a few crackers, a piece of fruit or a warm drink counts. It doesn't have to be a proper meal to be a step.

If you take medicine for your gut or your mood, keep taking it as prescribed. Crohn's & Colitis UK points out that when you're low, not sticking to your usual treatments can lead to more frequent flare-ups. Any change is a decision to make with your doctor, never on your own.

Your Appetite Can Come Back

Sadness is not a fault in you, and a closed stomach during a hard time is not your body breaking. Giving the feeling some room, through talking, writing, crying or simply being with someone, is worth doing for its own sake.

Some things are for a doctor, not for waiting it out. The NHS says to ask for an urgent GP appointment or get help from NHS 111 if you have lost a lot of weight for no reason, are bleeding from your bottom or have bloody diarrhoea, or find a hard lump or swelling in your tummy. And if the low feeling has turned into thoughts of harming yourself, Crohn's & Colitis UK says to tell someone you trust, call the NHS on 111 or go to your nearest A&E. In the UK, the Samaritans are there day and night on 116 123.

Lina didn't fix her evenings by forcing down dinner. What changed was that she stopped pretending she was fine, told a friend about the quiet nights, and let the grief in. Some weeks later she noticed she had finished her plate without thinking about it.

What have you been carrying lately that your stomach might be carrying for you?