Being told at a health check that you "have Helicobacter pylori" stirs up mixed feelings. You may have lived your whole life without trouble and wonder whether you really need to take medication, while the mention of a link to stomach cancer can give you a jolt of fear. Working through what this bacterium actually is, and whether you need eradication treatment, makes the decision much easier.
Helicobacter is a bacterium that settles and lives in the lining of the stomach. Infection is fairly common worldwide, including in Korea, and not everyone who carries it develops symptoms. Still, when the bacterium lingers for a long time, it causes chronic inflammation of the stomach lining; if that state drags on, it is known to progress from gastritis to atrophic change and intestinal metaplasia, raising the risk of stomach cancer along the way. The World Health Organization classifies this bacterium as a major risk factor for stomach cancer.
That said, having the bacterium does not automatically mean you will get stomach cancer. Only a portion of those infected actually go on to develop it, and other factors such as diet, smoking, and family history play a part as well. So rather than taking "Helicobacter equals stomach cancer" at face value, it is more balanced to understand it as one card that nudges your risk down a notch when removed.
Eradication treatment usually combines a drug that reduces stomach acid with two antibiotics, taken together for about one to two weeks. The key is to take the full prescribed course without missing doses. Stopping partway can let the bacterium survive and become resistant, making the next round harder. It is also wise, about a month after treatment, to confirm with a test such as a urea breath test that the bacterium is truly gone.
So does every infected person have to undergo eradication? The benefit is relatively clear for those who have had a stomach or duodenal ulcer, who have had an early gastric cancer removed endoscopically, or who have a family history of stomach cancer, among others. For someone with no symptoms and few risk factors, however, it is an area to weigh the pros and cons and decide together with a doctor. The drugs can carry side effects such as diarrhea or a bitter taste, so rather than assuming it is simply good for everyone, it is right to decide according to your own situation.
In short, Helicobacter is a clear factor that raises the risk of stomach cancer, but carrying it does not immediately turn into cancer. Whether you meet the conditions where eradication is recommended, and if you are treated, which drugs you take for how many days and when the confirmation test happens, is best decided in discussion with a doctor who knows your check-up results.
This article shares general medical information in plain language and does not replace individual diagnosis or treatment. Please discuss whether to undergo eradication and how to take the medication with your own care team.