Definitions for epiphenomenal. Here are all the possible meanings and translations of the word epiphenomenal. Wiktionary(0.00 / 0 votes)Rate this definition: epiphenomenal(Adjective) Being of secondary consequence to a causal chain of processes, but playing no causal role in the process of interest. epiphenomenal(Adjective) Of or pertaining to a mental process which occurs only as an incidental effect of electrical or chemical activity in the brain or nervous system.
1 Gallbladder Diseases: Gallbladder attacks often manifest as pain in the right side of the chest due to inflammation of the gallbladder, and this may become most noticeable after eating foods that are rich in fat. 2  You may also experience pain if gallstones become lodged in the bile duct.
Causes of sudden, severe abdominal pain. Some of the possible causes of sudden, severe abdominal pain include: appendicitis â swelling of the appendix that causes agonising pain in the lower right-hand side of your abdomen. a bleeding or perforated stomach ulcer â a bleeding, open sore in the lining of your stomach. acute cholecystitis â an inflamed gallbladder, often caused by gallstones.