Eating disorders such as anorexia and bulimia can cause significant physical harm to the body, and the stomach is particularly vulnerable. When eating patterns become severely disrupted, a range of stomach problems can develop, some of which carry serious health risks if left untreated.
How anorexia affects the stomach
People with anorexia restrict their food intake severely, often consuming far fewer calories than the body needs. Over time, this can lead to muscle loss throughout the body. The digestive tract is especially affected because weakened muscles there directly impair its ability to move food through the system.
When stomach muscles weaken, the digestive system becomes less efficient at breaking down and moving food. This can result in gastroparesis, a condition where the stomach empties more slowly than normal. Symptoms may include bloating, nausea, feeling full very quickly, and abdominal discomfort.
The nerves that control digestion can also become damaged through prolonged malnutrition. This may further slow gut motility and make eating feel uncomfortable, which can reinforce restrictive behaviours. Some people develop stomach ulcers due to changes in stomach acid production and the weakening of the stomach lining.
You may have heard that the stomach permanently shrinks during periods of restriction. While the stomach can temporarily reduce in capacity, it typically returns to normal size with proper nutrition and recovery. That said, this process can feel genuinely difficult, and the rate of change varies considerably between individuals.
Stomach problems linked to bulimia
Bulimia involves cycles of binge eating followed by purging, most commonly through self-induced vomiting. This pattern places enormous strain on the digestive system and can cause both immediate and long-term damage.
Repeated vomiting brings stomach acid into contact with the oesophagus and mouth, causing irritation and erosion. The stomach itself can become inflamed, leading to gastritis, which causes pain, nausea and a general feeling of being unwell.
In severe cases, the stomach wall can tear or rupture. This is a medical emergency and can be fatal. Seek urgent medical attention if you experience:
- Sudden, intense abdominal pain
- Vomiting blood
- Feeling faint or collapsing
Binge eating can also stretch the stomach and disrupt normal hunger and fullness signals. Over time, this can make it harder to recognise when the body genuinely needs food, complicating recovery efforts.
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Why these problems should not be ignored
Stomach problems caused by eating disorders can become serious if they are not addressed. Ulcers may bleed or perforate. Chronic gastroparesis can lead to malnutrition even when someone is trying to eat more. Electrolyte imbalances from vomiting, particularly low potassium, can cause life-threatening cardiac events and require emergency treatment.
Many of these issues can improve with treatment and nutritional rehabilitation, but early intervention tends to lead to better outcomes. A GP can assess physical symptoms and refer to appropriate specialists, including gastroenterologists and dietitians with experience in eating disorders.
Getting support in the UK
If you or someone you know is experiencing stomach problems related to an eating disorder, speaking to a healthcare professional is a sensible first step. GPs can provide referrals to NHS eating disorder services, which typically include medical monitoring, dietary support, and psychological therapies such as CBT. You can book a standard appointment or request an urgent one if symptoms are severe.
Beat, the UK's eating disorder charity, runs a helpline on 0808 801 0677, open 365 days a year. They also offer online support groups and information for families. Their services are free and confidential.
Recovery from an eating disorder is possible, though the path varies and some people experience lasting gastric issues even after eating patterns stabilise. Support is available, and seeking help early can make a real difference to both physical and mental health.
I don't think about it when I eat but after it hits me so hard
I feel disgusted in myself
So I’m recovering from starving myself, I would basically only eat veggies and no sweets or meat , and would run tons and now my tummy is always bloated and I fart a lot and I hate it, it’s fill hard my tummy most of the time , it’s sometimea okay when I haven’t eaten?! What do I do please help!!
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