May I assume you are doing this 'hot water treatment' well after you have washed/cleansed the area with the proper soap/cleaner and COOL water. Some people reading/skimming this thread will get the [lame] idea that if they are exposed to PI they should start heading for hot tap water FIRST even before they wash the dang stuff off their skin, and using hot water while the U oil is still on the skin surface will only open the pores and invite more problems.
I understand you are making an effort to relieve the urge to scratch, but let's get people to wash first using cool water and their soap/cleaner of choice.
Thank you for listening to my opinion.