what skin care regimen works best for psoriasis? Individuals with psoriasis arthritis have inflammation in their joints and may have other arthritis symptoms. Skin care is important because it can prevent or reduce the symptoms of psoriasis. However, in as many as 15 percent of cases, symptoms of psoriatic arthritis appear before symptoms of psoriasis itself. Flare-ups can appear for weeks or months, then disappear for a while with no apparent symptoms. However, when psoriatic arthritis symptoms precede symptoms of psoriasis, diagnosis is more difficult.