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  2. Drug-induced urticaria - Wikipedia

    en.wikipedia.org/wiki/Drug-induced_urticaria

    Some medications, like opioids and certain other drugs, induce urticaria by directly acting on mast cells, triggering histamine release. [2] Non-steroidal anti-inflammatory drugs (NSAIDs) contribute uniquely to urticaria by inhibiting the COX-1 pathway, leading to increased production of leukotrienes , vasodilators implicated in edema and ...

  3. Fixed drug reaction - Wikipedia

    en.wikipedia.org/wiki/Fixed_drug_reaction

    A painful and itchy reddish/purple patch of skin that occurs in the same location with repeated exposures to the causative drug is the classic presentation of a fixed drug reaction. The lips, genitals, and hands are often involved.

  4. Drug rash with eosinophilia and systemic symptoms - Wikipedia

    en.wikipedia.org/wiki/Drug_rash_with_eosinophil...

    The symptoms of DRESS syndrome usually begin 2 to 6 weeks but uncommonly up to 8–16 weeks after exposure to an offending drug. Symptoms generally include fever, an often itchy rash which may be morbilliform or consist mainly of macules or plaques, facial edema (i.e. swelling, which is a hallmark of the disease), enlarged and sometimes painful lymph nodes, and other symptoms due to ...

  5. Dermatographic urticaria - Wikipedia

    en.wikipedia.org/wiki/Dermatographic_urticaria

    In a normal case, the swelling will decrease without treatment within 15–30 minutes, but, in extreme cases, itchy red welts may last anywhere from a few hours to days. In some cases, welts are accompanied with a painful burning sensation. [3] This calls for more urgent treatment as the condition can impact on the patient's quality of life.

  6. Excessive daytime sleepiness - Wikipedia

    en.wikipedia.org/wiki/Excessive_daytime_sleepiness

    EDS can be a symptom of a number of factors and disorders. Specialists in sleep medicine are trained to diagnose them. Some are: Insufficient quality or quantity of night time sleep [5] Obstructive sleep apnea [6] Misalignments of the body's circadian pacemaker with the environment (e.g., jet lag, shift work, or other circadian rhythm sleep ...

  7. Aquagenic pruritus - Wikipedia

    en.wikipedia.org/wiki/Aquagenic_pruritus

    No definitive medical test is known for aquagenic pruritus. Rather, diagnosis is made by excluding all other possible causes of the patient's itching, including polycythemia vera. Since pruritus is a symptom of many serious diseases, it is important to rule out other causes before making a final diagnosis. [11]