Do the ointments you use help with the rashes? Are these ointments prescribed by your doctor?

Sadly, at this time this is no cure for psoriasis. But there are quite a few prescription medications which can help with the symptoms. There are topical treatments such as the ointments you’ve been using. But there are also more aggressive options for people who have more severe psoriasis. Often this involves immunosuppressives to calm the over active immune system.
I’ve posted 2 more links that shed a little more light on psoriasis for you.
https://www.mayoclinic.org/diseases-conditions/psoriasis/diagnosis-treatment/drc-20355845
https://www.livescience.com/42285-psoriasis-skin-treatment-cure.html
Also one more link regarding finding the right specialist to diagnose and treat your specific type of psoriasis. https://www.healthline.com/health/psoriasis/medical-specialists

Are you currently with a dermatologist or rheumatologist?