I have been shaving every 2 days for the last month now. I still get a lot of bumps on the back, but they are getting less worse every time. I changed my shaving cream to HeadSlick + Shave Secret oil, as few suggested here. After the shave, I rinse it with cold water, apply Witch Hazel, rinse with cold water again, and then put Aloe Vera Gel.
I am gonna try going WTG all over the head and then ATG all over to see if it makes a difference too. Hope this helps!