In some studies, experiencing anxiety suggest that it could increase the risk of developing certain long-term physical health problems, including diabetes, heart problems, and stomach ulcers. Unfortunately, there's not enough evidence to say for sure exactly what the risks are, or what groups of people are most likely to be affected. When anxiety happens, you might have racing thoughts but also physical symptoms, such as tense muscles, a rapid heartbeat, trembling, difficulty breathing, and pain and bloating in your abdomen. This infographic explains what anxiety looks and feels like.