What are the symptoms of poor digestion

Poor digestion, this is a more general description, poor digestion covers many symptoms, such as stomachache, bloating, loss of appetite, greasy, dry stool, or stool is always thin, or dry when thin, in addition can also show some stool color changes, or stool viscosity, in fact, see poor digestion, one is to see the diet situation, the other is to see the stool situation, if these two abnormal changes, can be said to be bad digestion.