Why Does My Stomach Hurt After Eating Chocolate?

Chocolate is associated with love, comfort, and indulgence. It is often the first thing we offer to loved ones during times of celebration and even sadness. Despite all the positive emotions associated with chocolate candies and other treats, some people have a chocolate sensitivity or allergy.
Experiencing a stomachache after eating chocolate can turn those positive associations into negative ones. To combat stomach pain immediately after eating foods containing chocolate, opt for chocolate that is low in sugar and free of allergens like milk.
Is Chocolate Healthy?
Many of us consider chocolate bars, chocolate ice cream, and chocolate milk to be the main sources of dietary chocolate. However, you do not have to consume sugary foods to get the chocolate flavor you desire.
Chocolate comes from cocoa beans, which grow on cocoa trees. This is where hot cocoa gets its name. Fortunately, cocoa has some health benefits. According to Harvard Health Publishing, studies on cocoa suggest that it improves cognitive functions due to its flavanol content.
Cocoa is also used to make cacao nibs and cacao powder, a chocolate-tasting food that is rich in antioxidants. It is also a source of numerous minerals, such as iron, copper, magnesium, and phosphorus.
Commercial chocolate, however, is not as nutrient dense. Most chocolate bars contain added ingredients like sugar, high-fructose corn syrup, milk fat, vegetable oils, and more. According to the U.S. Department of Agriculture (USDA), a 40-gram (g) serving of chocolate, which is approximately three pieces, contains the following:
- Calories 220
- Protein 5g
- Fat 15g
- Carbohydrates 19g
- Fiber 1g
- Sugar 16g
Stomachache After Eating Chocolate
Chocolate sensitivity is rare, so many cases of chocolate sensitivity are usually attributed to lactose intolerance or milk allergies. This is one possible explanation for stomach pain immediately after eating chocolate products.
According to Mayo Clinic, allergies to cow’s milk is one of the most common food allergies in children. If someone is allergic to milk, an allergic reaction typically occurs immediately after consuming food containing the allergen. Stomach pain immediately after eating chocolate can be a symptom of dairy allergy, though abdominal cramps can be a sign that takes longer to develop.
If milk chocolate is the culprit, you can consider switching to dark chocolate to alleviate stomachaches after eating chocolate. However, the U.S. Food and Drug Administration (FDA) warns that many dark chocolate products actually contain milk. They found that 15 percent of dark chocolates with the labels “dairy-free” or “lactose-free” actually contained milk. People with milk allergies are advised to consume dark chocolate with caution.
Chocolate Sensitivity and Allergies
If you develop a stomachache after eating chocolate, there could be multiple culprits. Cleveland Clinic notes that dairy products, as well as foods containing excess salt, fat, and high-fructose corn syrup, can cause stomach pain. Many chocolate products contain some, if not all, of these triggers.
Sugar can be another cause of stomach pain immediately after eating chocolate. Too much sugar can cause stomachaches as well as other consequences such as obesity and other health problems, according to Cleveland Clinic.
Whether due to a chocolate sensitivity, milk allergy, or ingredients that upset your digestion, experiencing a stomachache after eating chocolate is uncomfortable and disappointing. If you are not allergic to chocolate, consider eating it in moderation to avoid negative reactions.
- Harvard Health Publishing: “Cocoa: A Sweet Treat for the Brain?”
- USDA: “Chocolate”
- Mayo Clinic: “Milk Allergy”
- FDA: “Allergic to Milk? Some Dark Chocolate Labeled as Dairy-Free May Still Contain Milk”
- Cleveland Clinic: “Stomachaches in Kids: 5 Things Parents Should Know”
- Cleveland Clinic: “Feel Bloated? 5 Odd Reasons for Your Stomach Pain”

Kayli Anderson, RDN
Medical Reviewer
Kayli Anderson has over a decade of experience in nutrition, culinary education, and lifestyle medicine. She believes that eating well should be simple, pleasurable, and sustainable. Anderson has worked with clients from all walks of life, but she currently specializes in nutrition therapy and lifestyle medicine for women. She’s the founder of PlantBasedMavens.com, a hub for women to get evidence-based, practical, and woman-centered guidance on nutrition and cooking, hormone health, fertility, pregnancy, movement, mental well-being, nontoxic living, and more.
Anderson is board-certified in lifestyle medicine and serves as lead faculty of the American College of Lifestyle Medicine’s (ACLM) "Food as Medicine" course. She is past chair of the ACLM's registered dietitian member interest group, secretary of the women's health member interest group, and nutrition faculty for many of ACLM's other course offerings. She is the coauthor of the Plant-Based Nutrition Quick Start Guide and works with many of the leading organizations in nutrition and lifestyle medicine to develop nutrition content, recipes, and educational programs.
Anderson frequently speaks on the topics of women’s health and plant-based nutrition and has coauthored two lifestyle medicine textbooks, including the first one on women’s health, Improving Women's Health Across the Lifespan.
She received a master's degree in nutrition and physical performance and is certified as an exercise physiologist and intuitive eating counselor. She's a student of herbal medicine and women's integrative and functional medicine. She lives with her husband in the Colorado Rocky Mountains, where you’ll find her out on a trail or in her garden.
