As medical researchers and healthcare providers have emphasized in messages to the public over the past decades, cancer can often be beaten or at least managed. But this depends on one all-important factor—detecting the disease before it has the chance to develop and spread. Stomach cancer isn’t the most common form of cancer in the United States, but unfortunately, this means that it isn’t often screened. As such, people reporting symptoms that could be warning signs often get misdiagnosed or simply go undiagnosed altogether. But while early-stage stomach cancer can be hard to catch, knowing how it can manifest might give you the crucial time you need. As the American Cancer Society notes, “people who have any of these problems, especially if they don’t go away or get worse, should check with their doctor so the cause can be found and treated.” Here are some stomach cancer symptoms: 1. Heartburn  …