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  2. Lightheadedness - Wikipedia

    en.wikipedia.org/wiki/Lightheadedness

    Lightheadedness is a common and typically unpleasant sensation of dizziness [1] or a feeling that one may faint. The sensation of lightheadedness can be short-lived, prolonged, or, rarely, recurring. In addition to dizziness, the individual may feel as though their head is weightless. The individual may also feel as though the room is "spinning ...

  3. Postorgasmic illness syndrome - Wikipedia

    en.wikipedia.org/wiki/Postorgasmic_illness_syndrome

    Postorgasmic illness syndrome. Postorgasmic illness syndrome (POIS) is a syndrome in which human males have chronic physical and cognitive symptoms following ejaculation. [1] The symptoms usually onset within seconds, minutes, or hours, and last for up to a week. [1] The cause and prevalence are unknown; [2] it is considered a rare disease.

  4. Pacemaker syndrome - Wikipedia

    en.wikipedia.org/wiki/Pacemaker_syndrome

    Pacemaker syndrome is a condition that represents the clinical consequences of suboptimal atrioventricular (AV) synchrony or AV dyssynchrony, regardless of the pacing mode, after pacemaker implantation. [1][2] It is an iatrogenic disease—an adverse effect resulting from medical treatment—that is often underdiagnosed. [1][3] In general, the ...

  5. Post-exertional malaise - Wikipedia

    en.wikipedia.org/wiki/Post-exertional_malaise

    Post-exertional malaise (PEM), sometimes referred to as post-exertional symptom exacerbation (PESE) [1] or post-exertional neuroimmune exhaustion (PENE), [2] is a worsening of symptoms that occurs after minimal exertion. It is the hallmark symptom of myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) and common in long COVID and ...

  6. Tired light - Wikipedia

    en.wikipedia.org/wiki/Tired_light

    Tired light is a class of hypothetical redshift mechanisms that was proposed as an alternative explanation for the redshift-distance relationship. These models have been proposed as alternatives to the models that involve the expansion of the universe. The concept was first proposed in 1929 by Fritz Zwicky, who suggested that if photons lost ...

  7. Myalgic encephalomyelitis/chronic fatigue syndrome - Wikipedia

    en.wikipedia.org/.../chronic_fatigue_syndrome

    Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a disabling chronic illness. People with ME/CFS experience profound fatigue that does not go away with rest, sleep issues, and problems with memory or concentration. Further common symptoms include dizziness, nausea and pain. [3] The hallmark symptom is a worsening of the illness ...