Common Celiac Disease Symptoms

Overview

Celiac disease (also spelled coeliac disease) is a long-term condition where eating gluten causes your body's immune system to attack the lining of your small bowel. Gluten is a protein found in wheat, barley and rye. This damage makes it hard for your gut to absorb nutrients from food. It is not a food allergy and it is not caused by something you did wrong.

Yes, it is fairly common. Around 1 in 100 people worldwide are thought to have celiac disease, though many don't know it. It is more common in some regions and less common in others. Because symptoms vary so much, many people are missed or told they have something else, like irritable bowel syndrome.

Celiac disease can affect anyone at any age, from young children to older adults. It is more common in people with a close relative who has it, and in people with other autoimmune conditions such as type 1 diabetes or thyroid problems. It affects slightly more women than men. It can first appear in adulthood, even if you have eaten gluten for years without trouble.

Symptoms

Common symptoms

• Bloating, wind and a swollen tummy
• Diarrhea, constipation, or both at different times
• Stomach pain or cramping
• Feeling very tired or low in energy, even after rest
• Low iron levels (anemia), which can cause pale skin, breathlessness or dizziness
• Losing weight without trying
• Mouth ulcers that keep coming back
• An itchy, blistery skin rash, often on elbows, knees or buttocks
• Bone or joint pain, and bones that break more easily
• Tingling or numbness in hands and feet
• Brain fog — trouble concentrating or remembering things
• Irregular periods, or trouble getting pregnant
• Feeling sick or being sick
• Low mood or anxiety

Symptoms in children

• Poor growth or slow weight gain
• A big, swollen tummy and thin arms and legs
• Pale, smelly stools that float and are hard to flush away
• Being irritable or unusually clingy
• Poor appetite or refusing food
• Being sick or getting stomach aches often
• Late puberty
• Weak or discolored tooth enamel
• Tiredness and trouble concentrating at school

Symptoms in older adults

• No digestive symptoms at all — tiredness, low iron or thin bones may be the only clue
• Anemia that keeps coming back or doesn't improve with iron tablets
• Weak, brittle bones (osteoporosis) or more fractures than expected
• Weight loss that wasn't planned
• Tingling, numbness or balance problems
• Being told you have irritable bowel syndrome that doesn't quite fit
• Feeling low in energy or low in mood for no clear reason
• Mouth ulcers or a sore, burning mouth

Causes

Main causes

• Celiac disease happens when your immune system reacts to gluten, a protein in wheat, barley and rye.
• It only develops in people who carry certain genes (HLA-DQ2 or HLA-DQ8), but most people with these genes never get celiac disease.
• Something in the environment usually needs to 'switch it on', such as an infection, stress, pregnancy, or a time of change in the body — though we don't fully understand this yet.
• It is not caused by eating too much bread, by bad hygiene, or by anything a parent did.

Risk factors

• Having a parent, child or sibling with celiac disease
• Having another autoimmune condition, such as type 1 diabetes, thyroid disease or autoimmune liver disease
• Having a condition called dermatitis herpetiformis (an itchy blistering rash)
• Having Down syndrome, Turner syndrome or Williams syndrome
• Having IgA deficiency, a common immune condition that can also affect test results
• Being of any age — it can start in children or in later life

When to see a doctor

See a doctor urgently if:

• Blood in your stools, or black tarry stools
• Vomiting blood
• Severe belly pain that won't settle
• Signs of dehydration: dizziness, confusion, very little urine, sunken eyes
• Weight loss that is rapid or unexplained
• Not being able to keep fluids down for more than a few hours — this is more urgent in children and older adults

Book a routine appointment if:

• Ongoing bloating, wind, diarrhea or constipation that lasts more than a few weeks
• Tiredness that doesn't improve with rest
• Low iron that keeps coming back or doesn't improve with treatment
• Mouth ulcers that keep returning
• An itchy blistery rash on elbows, knees or buttocks
• Poor growth or delayed puberty in a child
• Fractures from minor knocks, or thin bones on a scan
• A family member has just been told they have celiac disease

Diagnosis

Doctors start with a simple blood test. If it suggests celiac disease, you may be referred to a specialist for a small camera test called an endoscopy (a thin tube passed through your mouth) to look at the lining of your small bowel and take tiny samples, called biopsies. It's important to keep eating gluten every day until all tests are finished — if you stop gluten first, the tests can come back normal even when you do have celiac disease.

Tests that may be done

• A blood test for celiac antibodies (usually called tTG-IgA), plus a check of your overall IgA level so the result is read correctly
• Genetic testing (HLA-DQ2 and HLA-DQ8) — useful to rule celiac disease out, but not to prove you have it
• Endoscopy with small bowel biopsies — the confirmatory test
• Blood tests for iron, folate, vitamin B12, vitamin D, calcium and thyroid function
• A bone density scan if your doctor thinks your bones may be thin
• A skin biopsy if you have the itchy blistering rash
• Tests for other conditions that can look similar, such as irritable bowel syndrome or a gut infection

What to expect at your appointment

The blood test is quick and feels like any other blood draw. The endoscopy is usually done as a day case with light sedation or a throat spray, takes about 15 to 20 minutes, and you'll need someone to take you home. You may have a sore throat or feel bloated for a few hours afterwards. Results usually take one to two weeks. Waiting can feel stressful, so it can help to write down your questions beforehand and take someone with you to appointments.

Treatment

There is no cure, but celiac disease is very treatable. The main treatment is a strict, lifelong gluten-free diet. This allows the lining of your small bowel to heal, usually over several months to a couple of years, and stops symptoms for most people. You'll also need regular check-ups and sometimes extra vitamins or minerals if your levels were low.

Self-care at home

• Learn to read food labels carefully — gluten can hide in sauces, soups, stock cubes, soy sauce, sausages and ready meals
• Keep a simple food and symptom diary at the start so you can see what helps
• Avoid cross-contamination: use separate toasters, boards and utensils, and check shared butter, jam and spreads
• Ask about gluten-free options when eating out, and check restaurant menus or apps in advance
• Get into a routine with check-ups and blood tests, even when you feel well
• Take any vitamin or mineral supplements your doctor advises, and don't start supplements on your own without checking
• Keep active and eat a balanced gluten-free diet with plenty of fruit, vegetables, beans, eggs, fish, meat and naturally gluten-free grains like rice, corn and buckwheat
• Tell your dentist and pharmacist about your condition, as some medicines and dental products contain gluten

Medical treatments

Treatment is led by your doctor, often with a specialist dietitian who will help you plan a balanced gluten-free diet and check you're getting enough nutrients. You'll have regular blood tests to check your antibody levels and to look for low iron, vitamins or minerals, and these are topped up with supplements if needed. Some people with ongoing symptoms or delayed healing are referred to a specialist for further review. Researchers are studying other treatment approaches, but a gluten-free diet remains the mainstay. Never start or stop any medicine, vitamin or supplement without speaking to your doctor or pharmacist first.

When is surgery considered?

Surgery is not used to treat celiac disease. In rare cases, surgery may be needed for a serious complication, such as a bowel blockage or a related problem, and your specialist team would discuss this with you fully.

Living with this condition

The first few months on a gluten-free diet can feel like a lot to learn, but most people find it becomes second nature. You'll get quicker at spotting gluten on labels, finding safe foods, and knowing which restaurants and shops work for you. Many people notice their symptoms improve within weeks, though full healing of the gut can take longer. Some people still have troublesome symptoms at first — this is common and worth raising with your dietitian rather than struggling alone.

Lifestyle tips

• Build meals around foods that are naturally gluten-free: rice, potatoes, corn, quinoa, beans, eggs, fish, meat, fruit and vegetables
• Try a few reliable gluten-free staple foods so you always have something safe at home
• Plan ahead for travel — pack snacks, learn a few phrases about gluten in the local language, and check airline meals
• Talk to your workplace or school about safe food options for meetings and events
• Watch out for non-food sources, such as some lip balms, toothpaste, play dough and Communion wafers — ask your pharmacist or faith leader
• Be kind to yourself when mistakes happen — they're normal, and one slip is unlikely to cause lasting harm
• Join a local or online celiac group for practical tips and encouragement

Diet and exercise

A gluten-free diet can be healthy, but gluten-free packaged foods are sometimes lower in fiber and higher in sugar and salt. Try to base meals on fresh, naturally gluten-free foods and include fiber from fruit, vegetables, beans and gluten-free whole grains. Regular movement — walking, swimming, cycling, or whatever you enjoy — helps your bones, your energy and your mood. If your bones are thin, ask your doctor which activities are safe for you. Speak to your dietitian before taking any supplement, as some are not gluten-free.

Mental health and emotional wellbeing

It's completely understandable to feel upset, anxious or frustrated. Being diagnosed with a long-term condition, and having to think about food at every meal, can feel like a lot. Some people grieve for the foods and social occasions they've lost, and eating out can feel awkward at first. These feelings usually ease as you build confidence and routines. If low mood, worry or disordered eating thoughts are affecting your daily life, please tell your doctor — support is available, and you don't have to manage this alone.

Prevention

Celiac disease cannot currently be prevented — there is no diet, lifestyle change or habit that stops it from developing. There is no evidence that delaying when a baby starts eating gluten, or avoiding gluten during pregnancy, reduces the risk. What you can do is get tested if you're at higher risk, so treatment can start early and prevent problems like weak bones and low iron.

Vaccines

There is no vaccine for celiac disease. However, it's important to keep up with routine vaccinations. If your spleen isn't working properly, or you have other immune conditions, your doctor may recommend some extra vaccines — ask your GP or practice nurse.

Screening programmes

Celiac disease is not routinely screened for in everyone. Testing is usually offered if you have symptoms, or if you're in a higher-risk group — for example, a close relative with celiac disease, type 1 diabetes, thyroid disease, Down syndrome, or unexplained low iron or thin bones. If you're thinking about testing, do it before you start a gluten-free diet, as going gluten-free first can make the results falsely normal.

Complications

If left untreated

• Poor absorption of nutrients, leading to low iron, low vitamin B12, low folate or low vitamin D
• Thin, weak bones (osteoporosis) and more broken bones
• Slowed growth and delayed puberty in children
• Trouble getting pregnant, or more problems during pregnancy
• Nerve damage causing tingling, numbness or balance problems
• Mouth ulcers and tooth enamel problems
• Feeling very tired, low in mood or foggy-headed
• A small increased risk of some gut cancers, such as lymphoma of the bowel — this risk falls once you follow a gluten-free diet
• Rarely, serious gut problems such as narrowing of the bowel or ongoing inflammation that needs specialist care

Long-term outlook

The outlook is generally very good. Most people who follow a gluten-free diet find their symptoms improve within weeks, and their gut heals over months to a couple of years. You can live a full, active life with celiac disease — you'll just need regular check-ups and a bit of planning around food. Some people take longer to feel better or still have some symptoms, and that's worth discussing with your dietitian or specialist, because there is often something that can be adjusted to help.

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