The worm represents a part of yourself that you do not like, or that you think is disgusting. Another possible dream meaning of worms is that you are dealing with self esteem issues. Perhaps you have just experienced something that lowered your self esteem.
Gastric ulcer definition, a peptic ulcer located in the stomach's inner wall, caused in part by the corrosive action of the gastric juice on the mucous membrane. See more. Dictionary.com
Gas Definition. A gas is defined as a sâtate of matter consisting of particles that have neither a defined volume nor defined shape. It is one of the four fundamental states of matter, along with solids, liquids, and plasma. Under ordinary conditions, the gas state is between the liquid and plasma states.