The primary treatments for moderate to severe plaque psoriasis and psoriatic arthritis are either pills, brief injections under the skin (either done by you, a loved one, or by a health care provider in a medical setting), standing in front of special ultraviolet lights at home or in a medical setting, or as treatments given to you intravenously while you sit at a medical infusion center. We would note that people who self-inject under the skin generally find it not to be a problem after a couple of tries; and that patients often read, check their email, or watch TV while getting their infusions.