Nausea from deer flies, what to do?

Please explain...: ...why you think deer flies have contributed to your nausea? Nausea can be caused by lots of things & may originate from disease outside the GI tract. Further evaluation is in order before anyone can answer "what to do." your doctor will want to re-examine you as well as know the quality, timing, duration, location, & associations (eating, position, activity, stooling, urinating) of your symptoms.