Suggest Remedy For Itchy Skin Rashes Around The Pubic Region

I have a red, burning, itchy rash in my pubic hair area. I have been to the dermatologist and they prescribed many different ointments, currently fluticasone propionate 0.005% and calcipotriene and betamethasone dipropionate ointment 0.005%-0.064%. it is not even touching it. i, also, have psoriasis, but that s on my foot. i thought and asked the doctor if this could be some form of psoriasis, but she did not think it was. i have a recheck appt, but i am just annoyed that they don t know what it is and it seems to be getting worse. i have changed to using FREE detergents and soaps, long before using the ointments.. and nothing is working. it s spread to the just the outer part of the crease area, as well. it hurts to touch and the itching is beyond belief.