I've never had it, but this is what I found online..
Treating PUPPP
Depending on the severity of PUPPP, doctors usually use topical moisturizing creams or aqueous ointments to treat mild cases. Corticosteroid creams and ointments are usually used when the condition has reached extreme severity, and if the condition is too out of control, the doctor will treat the patient with oral corticosteroids. Antihistamine tablets may be prescribed to provide relief from the itchiness, but do not work as well as the corticosteroid creams and ointments. The important thing to remember is that after the birth of your baby, the condition and symptoms go away within a week or so. Still, not all women are so lucky, and some continue to experience symptoms during their postpartum period.
Some women prefer to use home remedies to treat their PUPPP. Aloe and oatmeal baths are said to help soothe the itch while decreasing the red appearance of the condition. Ice packs can also take down the redness and swelling. Wearing baggy clothes can always help prevent discomfort when you’re pregnant, and especially if you’re prone to skin rashes such as PUPPP. The sun, heat, warm water, and clothing can aggravate the rash, so staying cool is essential to help contain the itch and other symptoms.
I developed it and my doc told me the same thing so I researched and found ways to help cure the rash rather than treat the symptoms. However, the regimine I followed has a lot to it and the herbs I Boughy were relatively exoensive however I did not have to use steroids and after starting the regimine last wedsday my rash was already almost gone by yesterday and I haven't had to take any antihistamines in several days. I am very happy with my results considering some women don't get any relief until after delivery. Would you like the long list of things I did?
Jock itch works for me. The spray on dry kind. It does wonders for several hours. Its kind of cold at first but its really soothing.