80% of my hubby's psoriasis cleared up over months. I think improving blood circulation, reducing cholesterol played a big role. we did a blood test to monitor the levels. he doesn't look too fat but cholesterol are inside vessels. I think these are areas you can explore after pregnancy. I don't dare to suggest anything during pregnancy to avoid complications. a blood test that shows cholesterol levels, uric acid etc is really helpful to find out which areas to target.
Hafizah