I do own a headblade, but haven't used it in about a week or so. I had the same problem when I first started shaving my head. I found if I turned the blade around and pulled instead of pushed, it would cause alot less irritation. I haven't used my head blade because I don't like Atra blades, and where I usually get Sensor blades, they are out of stock.
When I do buy Sensor blades, I usually buy the women's cartridges because I don't razor burn. I have used my wife's Gillette Venus and found they don't razor burn. She currently isn't using her Venus because we found cheaper women's three blade razors at the dollar tree. They are three for a $1. If I use men's products to shave my head, they will razor burn and cause my skin to break out.
For shaving I use the store brand version or Skintimate or some kind of women's gel to shave. I hope this may have helped.