Help! This is getting frustrating and need help!

Kori
I have a question...
I am one week post partum. I have had severe bouts of itchy skin. It has gotten so bad that I have scratched things raw to the point they have scabbed. I have tried to take things to stop the itching... Benadryl and other things similar... Plus tried lotions and the like as well. 
Has anyone else had issues with this? Any suggestions to make it stop?? Anyone know what could cause this?