How to Shave Armpits with an Electric Razor | Stretch, Glide, Don’t Press

Armpit hair grows in every direction, and the skin there folds the moment you drop your arm. That’s why the single biggest cause of nicks, burn, and patchy results isn’t a dull blade — it’s pressing down hard while the skin bunches up under the head. Manufacturers build underarm instructions around one idea: keep the skin flat and the razor moving slowly. Norelco’s own underarm guidance says to raise the arm, stretch the skin slightly, hold the shaving head in full contact, and shave with gentle strokes and light pressure.

Get the Skin Flat Before the Razor Touches It

Stretched skin is what lets the cutter reach the base of the hair instead of skimming over a fold. Raise the arm overhead, then use your free hand to pull the underarm skin taut — toward your ribs or slightly up toward your shoulder, whichever flattens the hollow best. Move your arm as you work: shave the outer edge, then shift the arm angle to reach the center and the crease near the ribcage. If you leave the skin relaxed, the head catches the fold instead of the hair, which is exactly how razor burn starts.

Set the Switch and Use Light Pressure

On body razors built for underarms, the correct setting is a physical switch that changes how the head cuts — so find it before you start. Norelco’s underarm section directs you to prepare the underarm for wet or dry shaving, set the body-select switch to the underarm position on compatible body razors, turn the razor on, then shave with gentle strokes and light pressure. The light-pressure part isn’t optional advice. The same documentation warns that pressing hard may cause irritation and that the razor will not function properly when you bear down. Counterintuitive as it feels, extra pressure makes the cut worse, not closer.

Move slowly and deliberately. The instruction sheet for a Norelco body razor is direct about it: pressing hard may cause irritation and the razor will not function properly, so let the head do the work. Slower strokes also cut fewer passes — speed is what leaves stray patches and forces you back over irritated skin.

Which direction matters less than consistency. Philips’ body-grooming guidance says to keep the product in full contact with the skin, stretch the skin with your free hand, and move slowly against the direction of hair growth. That same guidance notes the razor can be moved in two directions to make underarm shaving easier — handy, since armpit hair often grows in a swirl rather than one clean direction.

If you’re still deciding which device belongs in your bathroom drawer, our roundup of the best electric razor for armpits covers the models that actually handle the curve of the underarm.

Why Some Electric Razors Can’t Do Armpits

Not every electric razor is meant for underarms, and using the wrong one is a common reason people give up on the method. The underarm instructions depend on a body-select switch and a specific foil shaving area, so the technique is built for body razors rather than universal to all electric shavers. Philips lists its compact wet/dry shaver as designed for facial hair and points underarm and leg users toward a Lady Shaver or SatinShave instead — clear proof that a facial shaver on armpits is the wrong tool. For the parts of body-use guidance that separate large areas from sensitive ones, the rule is blunt: use the shaving attachments for sensitive areas such as the groin or armpits when the manufacturer provides them.

Mistakes That Cause Bumps and Irritation

Almost every underarm shaving problem traces back to one of five habits. Each has a fix that takes seconds.

• Pressing too hard. The head stops working properly and the skin pays for it. Ease off until the razor glides on its own weight.
• Skipping the stretch. Loose skin folds into the cutter. Raise the arm and pull the skin taut with your free hand.
• Moving too fast. Fast strokes miss hair and force repeat passes over already-irritated skin. Slow down.
• Deodorant or alcohol-based lotion right before or after. The instructions specifically warn against applying either immediately before or after shaving. Give the skin time first.
• Reaching for a facial shaver. If the manufacturer doesn’t list underarms for your model, switch to a body razor built for it.

Give yourself a dry run on one underarm first. Stretch the skin, set the switch, and go slow with almost no pressure — you’ll feel the difference in how the head meets the hair.

The full sequence, start to finish: raise the arm and stretch the skin, set the body-select switch to the underarm position, turn the razor on, hold the head in full contact, shave slowly with light pressure, and leave deodorant and alcohol-based lotions off until later. Keep the pressure light, and your skin will let you know you got it right.