There are many different variations on the electric razor, but they can generally be broken down into two categories: wet shavers and dry shavers. Previously, all electric razors were the dry kind, but when wet shavers hit the market, they provided another option for men with sensitive skin. When electric shavers first came out, they were pretty rough on the face. With advancements, however, many top quality electric shavers can now get as close to the skin as a blade.
Electric razors work by shearing the whiskers as close to the skin as possible. The whiskers enter a perforated round metal head, where spinning blades cut them. There are usually either three round sets of spinning blades (rotary), or two horizontal sets that go from side to side (foil). Getting the right one for your skin may take a little trial and error, and because of this, most electric shavers come with a money-back guarantee so you can try it out.
Early electric shavers had a set head, but now they rotate and pivot so they can come into closer contact to the contours of the face. Dry shavers are just that -- they require nothing more than stubble. Wet electric shavers, on the other hand, allow you to use a shaving lotion or even shave in the shower. Many men find that a high quality wet electric shaver is easy on the skin and provides a shave as close as a blade. It's also recommended that sensitive areas of the face, like the neck, are tackled first before moving on to the cheeks, chin and under the nose.