My neck leans forward too much. This bad posture causes my esophagus and my trachea tubes to be limited in size (see #1 in the sketch). When I eat, my esophagus temporarily gets filled to the brim. All the excess food is redirected into the trachea (see #2 in the sketch). This is more likely to happen with more liquidy items like yogurt, fruits, or milk + cereal.
The trachea then becomes constricted, making it hard for air to go through. My esophagus becomes less congested before long. However, the trachea is still filled with liquid. As a result, a lot of the air I breathe in gets redirected into the esophagus and the stomach, causing the bloating. My trouble defecating worsens the situation by causing the gas to remain for a long time.
Anyway, liquid getting redirected to the lungs is called aspiration from dysphagia. I haven’t been officially diagnosed by a doctor, but it would explain a lot. For example, it would explain the pneumonia I suffered a decade ago; that illness would be a particularly bad case of aspiration that got elevated.
