Your mental health can affect the way your body functions, from the top of your head to the tips of your toes — and everything in between. Bloating is actually a very common symptom of anxiety, especially for those who have anxiety attacks which are characterized by hyperventilation. Hyperventilation is when you take in more air than you need and can make you feel pressure in your stomach and cause you to belch, in addition to bloating your stomach. Anxiety also affects digestion, as it shuts down a part of the brain that is in charge of digesting food. Add stress to the mix, and you have an environment where foods that are normally digested may end up being digested poorly, leading to bloating.