Since the discourse community itself is intangible, it is easier to imagine discourse communities in terms of the fora in which they operate. The hypothetical journal and email list can each be seen as an example of a forum, or a concrete, local manifestation of the operation of the discourse community.
Daily nausea can be caused by stress. An ulcer in the small intestine may cause chronic nausea. Excessive consumption of caffeine can cause nausea. A person may develop chronic nausea in relation to a peptic ulcer. Indigestion is one of the most common causes of nausea.
Nausea and vomiting in adults isn't usually a sign of anything serious and tends to only last one or two days. Vomiting is the bodyâs way of ridding itself of harmful substances from the stomach, or it may be a reaction to something that has irritated the gut. One of the most common causes of vomiting in adults is gastroenteritis.