Hello, Welcome to healthcare magic. I understand your concern about the patches on your legs. It is called as post inflammatory hypopigmentation. Unfortunately, there is no solution for it which can act very rapidly. You could apply mineral oil on the patches and expose to sunlight for 1 few minutes. This will help to bring the colour back. You can also use camouflage creams like concealers which match your skin tone. This is an effective and easy way to hide the white patches till the colour comes back to normal. However, remember that these patches are the marks left behind by psoriasis patches which looked worse than the existing patches. So do not be too upset about what others think. Be positive and look at the brighter side that your psoriasis has healed well. Hope this helps you. Take care and wish you the best in life.