I had developed serious rashes and itchiness all over my body after miscarriage..believe due to the hormone change.The itchiness at peak during night time and I had a really bad time.
I visited doctor twice, and the rashes gone immediately when i took the medicine and applied the steroid cream. However, it comes back after the medicine finish. Therefore I decided to switch to take traditional chinese herb, however, the traditional way though does not harmful to body, but the effect takes time. I still feel the itchiness, at that time, accidentally i found the pine tar soap, use it to shower with cold water 2-3 times per day did help soothing the problem, and applied the shea butter after showering also help the conditions. After few weeks of taking chinese herb and using the soap and shea butter, finally, the skin condition under control and I can sleep soundly every night now 
Just sharing my experiences, hopefully whoever encounter such problem got some clue to work with it.
The shea butter that I'm using is also helping to prevent/reduce stretch marks. For mother-to-be, take note on that
