I didn’t think of that and yes you’re completely right, someone in my family has it and bruises horribly.Some of those marks are psoriatic plaques, lingering marks and scarring (dyspigmentation) which can photograph dark in the wrong light. The rest are bruises. People with severe psoriasis can bruise easily, especially if they are stumbling around pissed and stoned.
also, one of the treatments for severe psoriasis is methotrexate which can cause problems with the production of blood cells.