What can trigger a flare up of psoriasis? There are many triggers that can trigger a flare of psoriasis. Psoriasis triggers include sun exposure, steroid withdrawal, stress, alcohol, extreme weather changes, very warm or very cold temperatures, stress, et cetera. There may be also unique stressors that are exclusive to a particular patient or scenario such as traveling, weight gain, alcoholism or recent life stressors. Other factors that aggravate psoriasis include streptococcus infection, such as tonsillitis, injuries, such as cuts, abrasions, sunburns, the Koebner's phenomenon in which a psoriasis skin lesion appears as a result of trauma, sun exposure in patients. However, sun exposure is more often beneficial for these patients. Obesity, smoking, excess alcohol and stressful events. Medications such as lithium, beta blockers, anti-malarial, non-steroidal, anti-inflammatory medications, and others may sometimes trigger a psoriasis flare.
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