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Episodes of vasovagal syncope are typically recurrent and usually occur when the predisposed person is exposed to a specific trigger. Before losing consciousness, the individual frequently experiences early signs or symptoms such as lightheadedness, nausea, the feeling of being extremely hot or cold (accompanied by sweating), ringing in the ears, an uncomfortable feeling in the heart, fuzzy ...
Causes range from non-serious to potentially fatal. [1] There are three broad categories of causes: heart or blood vessel related; reflex, also known as neurally mediated; and orthostatic hypotension. [1] Issues with the heart and blood vessels are the cause in about 10% and typically the most serious while neurally mediated is the most common. [1]
Nausea is a non-specific symptom, which means that it has many possible causes. Some common causes of nausea are gastroenteritis and other gastrointestinal disorders , food poisoning , motion sickness , dizziness , migraine , fainting , low blood sugar , anxiety , hyperthermia , dehydration and lack of sleep .
Different self-reported causes of CFS are associated with significant differences in clinical measures and outcomes. [ 22 ] An examination of the CDC 1994 criteria applied to several hundred patients found that the diagnosis could be strengthened by adding two new symptoms (anorexia and nausea) and eliminating three others (muscle weakness ...
Malaise is a non-specific symptom and can be present in the slightest ailment, such as an emotion (causing fainting, a vasovagal response) or hunger (light hypoglycemia [2]), to the most serious conditions (cancer, stroke, heart attack, internal bleeding, etc.).
Post-acute infection syndromes (PAISs) or post-infectious syndromes are medical conditions characterized by symptoms attributed to a prior infection.While it is commonly assumed that people either recover or die from infections, long-term symptoms—or sequelae—are a possible outcome as well. [1]
ME/CFS causes debilitating fatigue, sleep problems, and post-exertional malaise (PEM, overall symptoms getting worse after mild activity). In addition, cognitive issues, orthostatic intolerance (dizziness or nausea when upright) or other physical symptoms may be present (see also § Diagnostic criteria). Symptoms significantly reduce the ...
Post-exertional malaise (PEM) and exercise intolerance are common symptoms of post-acute infection syndromes. [5] Post-exertional malaise is a worsening of symptoms after minimal physical or mental activity, [ 6 ] and is a cardinal symptom of myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS). [ 7 ]