You can apply sunscreen to psoriasis plaques to prevent sunburn, but, if the plaques from psoriasis are inflamed or cracked open, you should not apply sunscreen to that area. You’ll want to cover that ...
• Topical treatments: Over-the-counter 1% hydrocortisone cream can help with mild flare-ups. For more severe cases, pediatricians may prescribe stronger topical steroids or calcineurin inhibitors.