The short answer
Esophageal cancer risk is higher for people who smoke or use tobacco, drink heavily, or have long-term acid reflux and Barrett's esophagus. Obesity and older age also raise risk. The main risk factors differ between the two types of esophageal cancer.
Tobacco use and heavy alcohol use raise the risk of esophageal cancer.
Long-term acid reflux and Barrett's esophagus raise the risk of adenocarcinoma.
Obesity is linked to a higher risk of adenocarcinoma.
Risk rises with age, and men are affected more often than women.
Choose how you want to understand this
The full explanation.
Two types, two different causes
Esophageal cancer comes in two main forms. They do not share the same causes. Squamous cell carcinoma starts in the flat cells that line the esophagus. It usually starts in the upper and middle sections. Adenocarcinoma starts in gland cells instead. It usually starts near where the esophagus meets the stomach. Tobacco and alcohol mainly drive one type. Long-term reflux mainly drives the other. Knowing which type is being discussed changes which risk factors apply to you.
A risk factor is something that raises the chance of getting a disease. It is not a cause you can point to and blame. Many people with several risk factors never get esophageal cancer. Some people with none of them do.
Tobacco and alcohol raise squamous cell risk
Smoking and heavy drinking both raise the risk of squamous cell carcinoma. Used together, they raise it far more than either one alone. Chemicals in tobacco smoke injure the cells lining the esophagus. Alcohol injures them too. Over years, that repeated injury can turn into cancer.
Quitting smoking lowers your risk over time, even after decades of use. Cutting back on alcohol helps too. It helps most if you also smoke. These are the two most changeable risk factors for this type of esophageal cancer.
Reflux and Barrett's esophagus raise adenocarcinoma risk
Adenocarcinoma follows a different path. Gastroesophageal reflux disease, or GERD, happens when stomach acid flows back up into the esophagus. Most people with occasional heartburn never develop cancer. But reflux that is severe, daily, and long-lasting raises the risk of adenocarcinoma.
Over years, constant acid exposure can change the lining of the lower esophagus. Doctors call this change Barrett's esophagus. Normal lining gets replaced by tissue that looks more like the lining of the intestine. Barrett's esophagus raises adenocarcinoma risk further. Risk rises more when a biopsy shows dysplasia. Dysplasia means cells that look abnormal under a microscope but are not yet cancer. High-grade dysplasia carries the highest risk. Even so, most people with Barrett's esophagus never get esophageal cancer. Doctors usually manage it with regular endoscopies to watch for change. That is not a guarantee that cancer is coming.
Weight, diet, and activity
Carrying excess weight raises the risk of adenocarcinoma. Part of the reason is that it worsens reflux. Part of it is a separate effect on the body. Regular physical activity may lower that risk. Diet plays a role too. Eating a lot of processed meat may raise risk. A diet rich in fruits and vegetables may lower it. Drinking very hot liquids, above about 149°F (65°C), raises the risk of squamous cell carcinoma specifically. This matters most in parts of the world where tea or other drinks are commonly served very hot.
Other conditions that raise risk
A few less common conditions raise esophageal cancer risk further.
- Achalasia is a disorder where the muscle at the bottom of the esophagus does not relax properly. It sharply raises the risk of squamous cell carcinoma.
- Plummer-Vinson syndrome causes low iron and web-like growths in the esophagus. It also raises squamous cell risk.
- A past corrosive injury, such as swallowing lye, can raise squamous cell risk decades later.
- Tylosis is a rare inherited condition. It thickens the skin of the palms and soles. It also carries a very high lifetime risk of squamous cell carcinoma.
- A past cancer of the mouth, throat, or lungs raises risk too. Tobacco and alcohol affect that whole region, not just one spot.
What you cannot change
Age and sex both matter. About 9 in 10 esophageal cancers occur in people age 55 or older. Men develop esophageal cancer far more often than women, for both types. You cannot change your age, sex, or family history. But you can change several of the factors that combine with them to raise your risk.
Lowering your risk
Not smoking — or quitting if you do — is the single biggest step for squamous cell risk. Limiting alcohol matters too. If you have chronic, severe reflux, treat it with your doctor's guidance. Ask about being checked for Barrett's esophagus if reflux has lasted years. Keeping a healthy weight and staying active may help as well. None of this guarantees you will avoid esophageal cancer. Together, though, these steps meaningfully shift the odds.
When symptoms need attention now
Risk factors are about odds over years. Symptoms are different. They need attention now, whatever your risk factors are. Get checked promptly if you notice any of these:
- Trouble swallowing that is new or getting worse
- Food or liquid feeling stuck in your throat or chest
- Pain when you swallow
- Unexplained weight loss
Two signs are different in kind and should not go on that list. Call 911 or go to an emergency department if you vomit blood or something like coffee grounds, or your stool is black and tarry. That points to bleeding in the upper gut, which can be heavy and needs treating within hours. Go in the same way if food is lodged and you cannot swallow even your own saliva.
Most esophageal cancers cause no symptoms until later stages. Do not wait for symptoms to feel severe before calling your doctor.
What to ask your team
- Given my history, am I at higher risk for esophageal cancer — and which type?
- Should my long-term reflux or Barrett's esophagus be watched with endoscopy, and how often?
- Would quitting tobacco or cutting back on alcohol meaningfully lower my risk?
- Do I have other risk factors, like achalasia or a family history, that should change my screening plan?
- What symptoms should prompt me to call you right away?
Sources
Words to know
Tap any term to see what it means.
Common questions
What are the main risk factors?
The main risk factors include tobacco use, heavy alcohol use, long-term acid reflux with Barrett's esophagus, obesity, and older age. Men are affected more often than women.
How do tobacco and alcohol affect risk?
Both tobacco and heavy alcohol use raise the risk of esophageal cancer, especially the squamous cell type. Using both together raises risk more than either alone.
How does acid reflux raise risk?
Long-term acid reflux can lead to Barrett's esophagus, a change in the lower esophagus lining that raises the risk of adenocarcinoma.
Does weight matter?
Yes. Obesity is linked to a higher risk of esophageal adenocarcinoma, partly because it can worsen acid reflux.
Can I lower my risk?
You cannot change your age or sex, but not using tobacco, limiting alcohol, managing acid reflux, and keeping a healthy weight may help lower risk.
Questions to ask your doctor
Being prepared helps you get the most out of your appointments. Save or print these questions.
Tap a question to save it to your list (kept on this device).
Speak With Trained Specialists & Human Navigators
Cancer Explained provides educational guidance, but does not replace trained specialists, social workers, or your medical team.
Talk to a trained cancer information specialist
Free, confidential assistance from NCI Cancer Information Service via phone, chat, or email.
Contact your oncology team
Locate after-hours contact numbers, portal messages, or urgent triage phone lines.
Find a patient navigator
Get one-on-one help with appointments, logistics, translation, and care coordination.
Find a genetic counselor
Discuss inherited mutation risk, family history, and genetic testing options.
Find an oncology social worker
Access emotional counseling, family support groups, and mental health resources.
Find a financial navigator
Locate copay assistance foundations, grant programs, and lodging/travel support.
Find a clinical-trial specialist
Search matching studies and speak with NCI trial information specialists.
Get urgent help
Immediate emergency guidance for fever (>100.4°F during chemo), severe pain, or shortness of breath.
Help Us Improve This Guide
Did this explanation answer your question and help you determine your next step?
Know someone who needs this?
Plenty of people are looking for something like this and do not know where to start. If this would help a friend or someone you love, send it on — we have written an opening line so you do not have to stare at an empty message. You can change every word of it.
Your message is written and sent in your own email or messaging app — we never see who you send it to, and nothing is added to any list.
Knowledge Check
0 of 4 answered
This self-assessment checks understanding of educational content only. It is not medical advice.
Plain-language explanation of the published sources cited on this page. AI-assisted, source-checked, not clinician-reviewed.
Last updated: 2026-08-13Next planned review: 2027-07-07
How this page was created
Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes. We do not employ clinicians and do not intend to — our work is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status — Source checked. This page was written with AI assistance and checked line by line against the sources listed on it. That confirms the sources support what the page says. It is not a medical review, and it does not confirm the page is complete or right for your situation.
General education — varies by person. Answers genuinely differ between people. This page explains what commonly varies and points you to your care team for your situation.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
How this page was created
Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes. We do not employ clinicians and do not intend to — our work is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Source checked — This page was written with AI assistance and checked line by line against the sources listed on it. That confirms the sources support what the page says. It is not a medical review, and it does not confirm the page is complete or right for your situation.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
Read more about our editorial process, our use of AI, and our corrections policy.
Spotted a problem? Report an error — a factual mistake, broken or outdated source, confusing wording, or anything that seems unsafe. Please do not include names, medical record numbers, dates of birth, addresses, or other identifying medical information in your report.
After using this page, do you understand what to do next?
Anonymous — we only record the answer, never who gave it.
Related articles
Still have questions?
Educational answers, plain language
Free to print and share