The holidays are a time of celebration, often centred around abundant meals and decadent treats. It’s natural that routines get disrupted, and we might eat more than planned during festive feasts. If you find yourself feeling uncomfortable or guilty afterwards, you’re far from alone. In fact, surveys show that a majority of Americans, about 63%, experience “food guilt” during the holiday season. The post-feast slump, both physical and emotional, is a real phenomenon. Understanding where this feeling comes from can help you navigate it with compassion and clarity.

The Psychology Behind Post-Feast Guilt

Feeling guilty after overindulging is typically rooted in our mindset around food. For years, diet culture and social messages have labelled certain foods as “good” or “bad,” and by extension, we may feel like we’ve been “bad” or undisciplined when we eat those treats. During special occasions like Christmas or Thanksgiving, these internalised food rules often get broken; you have that extra slice of pie or an extra helping of a rich dish, and suddenly it can seem like you’ve failed some test of willpower. This guilt isn’t just in your head; it’s a common emotional response that can trap you in an unhelpful cycle of regret and self-blame.

Ironically, feeling bad about eating doesn’t prevent future overindulgence; in many cases, it does the opposite. Research has found that negative emotions often spike both before and after episodes of overeating or binge eating. In the wake of an indulgent meal, you might be tempted to punish yourself by skipping meals, embarking on a strict “detox,” or exercising to exhaustion. But such compensatory behaviours born of guilt tend to backfire. They can lead to an all-or-nothing mindset where you’re either “perfectly on track” or “completely off the rails,” which increases the likelihood of further bingeing and secret eating episodes instead of healthier habits. Over time, this guilt-shame cycle can erode your self-esteem and even contribute to disordered eating patterns. In short, the shame you feel after a feast is often more harmful than the calories you consumed.

Why Your Body Feels Lousy After Overeating

Beyond the emotional turmoil, there are straightforward physical reasons you might feel unwell after a heavy holiday meal. Overeating puts a lot of strain on the body. When you consume much more than usual in one sitting, your stomach has to expand beyond its normal size to accommodate the food. This can leave you feeling bloated, cramped, and literally uncomfortable in your clothes. Eating rich, fatty or spicy foods in large quantities can also trigger heartburn. Your stomach produces extra acid to digest the feast, and that acid can reflux into your esophagus, causing a burning sensation. It’s no wonder you might be groaning on the couch after that big dinner!

Additionally, indulgent meals often come loaded with sugar and simple carbohydrates (think desserts, holiday breads, and sweet cocktails). These can cause a swift spike in blood glucose followed by a sharp drop, a blood-sugar crash that saps your energy. The result is the notorious “food coma”: you feel sluggish, sleepy, or drowsy after eating a massive meal. Your body is diverting energy to digestion, and hormonal signals (like increased insulin and serotonin) are telling you it’s time to rest. While this post-meal drowsiness (known medically as postprandial somnolence) is usually short-lived, it can make you feel pretty lousy in the moment. You might also notice you’re overheating or sweating more than usual; this is a mini metabolic overdrive as your system works overtime to burn off the extra calories. All of these bodily responses, the bloating, reflux, fatigue, can amplify that sense that you’ve “overdone it,” contributing to feeling bad overall.

Putting Holiday Indulgence in Perspective

After the initial discomfort passes, it’s important to remember that one or two festive feasts do not derail your well-being. Our bodies are remarkably resilient and adept at maintaining balance. A day or two of overeating might make you a bit heavier on the scale the next morning, but much of that is temporary water weight and extra food volume, not instant fat gain. In fact, a landmark study found that the average person’s weight gain over the entire holiday season is under a pound⁴, far less than most of us fear. In other words, an occasional indulgence has only a minor lasting impact on your health. What really matters is the consistent pattern of your habits over time, not the calories from a single Christmas dinner or New Year’s party.

So why do we feel so guilty? Often, it’s because we attach moral value to eating, viewing ourselves as “good” or “bad” based on what (or how much) we consume. Remind yourself that enjoying special foods with loved ones is a normal, healthy part of life. There’s no need to beat yourself up for participating in the festivities. Instead of fixating on what you think you did “wrong,” try to focus on the positive: the memories made around the table, the delicious flavours you savoured, and the break from routine that holidays are meant to provide.

Finally, use that uncomfortable post-feast feeling as gentle feedback, not punishment. If you’re feeling bloated and sluggish, it might be a cue to return to your usual balanced habits: drink plenty of water, get some light movement (a relaxed walk can do wonders), and resume eating nutritious meals at the next opportunity. Avoid drastic measures like skipping meals or crash dieting to “make up” for indulging; this will only perpetuate the cycle of restriction and binge. Instead, practice moderation and self-compassion. Remember that everyone overeats sometimes, especially during celebrations. What defines your health is not one big meal, but your overall approach and relationship with food.

Bottom line: feeling a twinge of guilt or discomfort after a festive feast is common, but you don’t have to carry that guilt with you. By understanding the psychological and physical reasons behind it, you can break the cycle of overindulgence and regret. Enjoy the holiday treats for what they are, a special occasion, and then kindly let it go. Your body and mind will thank you for moving on without the baggage of overindulgence and guilt.

References

  1. People Staff. Americans Feel “Food Guilt” Over the Holidays, But Can’t Resist the Cookies and Candy, Survey Says. People Magazine [Internet]. 20 Nov 2020. Available from: https://people.com/food/sixty-three-percent-of-americans-experience-food-guilt-around-the-holidays-according-to-new-research/
  2. Sole-Smith V. What Food Guilt Is and How To Overcome It. Health.com [Internet]. Updated 11 Jan 2025. Available from: https://www.health.com/food/stop-food-guilt
  3. DeMarco C, Bramlet Blackburn K. What happens when you overeat? MD Anderson Cancer Center [Internet]. 1 Apr 2025. Available from: https://www.mdanderson.org/cancerwise/what-happens-when-you-overeat.h00-159775656.html
  4. Yanovski JA, Yanovski SZ, Sovik KN, Nguyen TT, O’Neil PM, Sebring NG. A prospective study of holiday weight gain. N Engl J Med. 2000;342(12):861–7.
  5. Berg KC, Crosby RD, Cao L, Crow SJ, Engel SG, Wonderlich SA, et al. Negative affect prior to and following overeating-only, loss-of-control eating-only, and binge eating episodes in obese adults. Int J Eat Disord. 2015;48(6):641–653.
  6. Bryan L. Why You Get Sleepy After Eating. Sleep Foundation [Internet]. Updated 28 Oct 2025. Available from: https://www.sleepfoundation.org/nutrition/why-do-i-get-sleepy-after-eating

Disclaimer: Medicinal cannabis and CBD oil are unapproved medicines in NZ which means that there is no conclusive evidence for their effect, apart from Sativex. Many doctors do not routinely prescribe cannabis medicines. The above article was written for general educational purposes and does not intend to suggest that medicinal cannabis can be used to treat any health condition. Please consult with your healthcare provider.