Thread: Wow, Pre-sharpened(Not!)

A properly honed and stropped razor to shave-ready state, should enable you to have a shave with no pressure at all, other than what it takes to hold the blade up to your face. If you cant do that, the common mistake to make (as you did, and as I did when I started), is to apply more pressure. This doesnt usually result in much greater hair removal, instead it will give you really painful razor burn, as you have experienced.

Did you strop the blade before use? If so, you may have dulled the blade. A good test that usually tells me whether a blade is about shave ready, is to run the blade over some air hairs about 2mm above the skin - it should have no problem removing the top of the hairs. If it doesnt do that, there is a good chance the razor is not shave ready.

Also as others suggested, your angle may be wrong.

Assuming you can cut arm hair and your burn is really bad, suggest you wait a couple days for it to heal, and then try the angle first.