How to Prevent Ingrown Hairs From Shaving
Key takeaways
- Ingrown hairs form when a cut hair curls back and grows into the skin instead of out of it, which is more common with curly or coarse hair.
- Shaving against the grain leaves a sharp, sub-surface tip that re-enters the skin more easily, so a first pass with the grain is the simplest prevention.
- Gentle exfoliation, a sharp blade, light pressure, and not over-shaving the same spot keep follicles clear and reduce ingrown hairs over time.
- Most ingrown hairs settle on their own; anything painful, spreading, pus-filled, or infected is a job for a pharmacist or doctor.
Ingrown hairs from shaving form when a cut hair curls back and grows into the skin instead of out of the follicle, and you prevent them with gentle exfoliation, a sharp blade, light pressure, and a first pass with the grain. When I switched from a cartridge razor, the angry little bumps along my neck were the first thing to disappear, and the change came almost entirely from how I shaved rather than what I shaved with.
Why ingrown hairs form
An ingrown hair forms when a hair that has been cut grows back into the skin rather than up out of the follicle. Shaving leaves the tip of the hair sharp, and if that tip is cut below the surface or bends as it regrows, it can pierce the follicle wall or re-enter the skin nearby. The NHS notes that ingrown hairs are most common in people with coarse or curly hair, because a curly hair naturally grows in a curved path and is far more likely to turn back toward the skin as it grows. The result is a small, sometimes itchy bump, and when the skin inflames around it you get the raised spots most people call razor bumps.
How shaving direction changes the risk
Shaving against the grain is the single biggest avoidable cause. Cutting against the direction of growth pulls the hair slightly out of the follicle and slices it off below the skin line, leaving a short tip sitting under the surface. As that tip grows, it can easily turn sideways or curl back in before it clears the opening. A first pass with the grain cuts the hair close to skin level instead of under it, which keeps the tip pointing the right way. The American Academy of Dermatology also advises against pulling the skin taut while you shave, because the cut hair retracts below the surface when you let go. If you want a closer finish, build it from careful extra passes rather than going against the grain straight away; we map this out in shaving with the grain and against the grain.
Why exfoliation helps
Gentle exfoliation keeps the follicle openings clear so regrowing hairs can emerge cleanly. Dead skin and oil can block the surface of a follicle, trapping the new hair underneath, so a light scrub or a soft washcloth a day or so after shaving lifts that layer and frees hairs that are starting to turn back in. The key word is gentle: aggressive scrubbing irritates the skin and can make bumps worse. I exfoliate the neck a couple of times a week with a flannel and warm water on a non-shaving day, and it has done more for my ingrown hairs than any product. The American Academy of Dermatology lists regular gentle exfoliation among its core measures for managing razor bumps.
A sharp blade and light pressure
A sharp blade and almost no pressure keep the cut clean and the follicle undamaged. A dull blade tugs the hair and tears rather than slicing it, leaving a ragged tip that is more likely to grow back in, so change a double-edge blade roughly every 5 to 7 shaves, sooner if it starts to drag. Let the weight of the razor do the work at about a 30 degree angle and resist the urge to bear down, since pressure scrapes the skin and forces the blade below the surface. Re-lather between passes so the razor always glides on a fresh cushion rather than dry skin.
Shave less often and over fewer spots
Going over the same patch repeatedly, or shaving every single day, gives the skin no time to recover. Each pass over an already-shaved area scrapes the surface and raises the chance of an ingrown hair, so resist chasing perfect smoothness on the neck and jaw, where curly hair makes bumps most likely. If you are prone to ingrown hairs, leaving a day between shaves, or shaving the neck a little less often than the cheeks, gives follicles time to clear. Letting the area rest is often the fix when bumps keep coming back.
When to see a doctor
Most ingrown hairs settle on their own within a week or two once you leave the area alone. Do not dig them out with tweezers or a needle, which can scar the skin and push bacteria in. The NHS advises seeing a pharmacist or doctor if an ingrown hair becomes very painful, looks infected, or keeps coming back, as you may have a deeper inflammation that needs treatment. Anything that is spreading, pus-filled, or not healing is a medical question, not a shaving one. For how these bumps differ from plain irritation, see razor bumps vs razor burn.
This guide is general information and one shaver’s experience, reviewed by a master barber. Everyone’s skin is different, so introduce new habits gently and see a professional if a problem persists.
References
- Ingrown hairs, NHS.
- Razor bump treatment, American Academy of Dermatology.
- Tips for men with sensitive skin, American Academy of Dermatology.
Frequently asked questions
What causes ingrown hairs from shaving?
An ingrown hair forms when a hair that has been cut grows back into the skin instead of up and out of the follicle. Shaving sharpens the tip of the hair, and if it is cut below the skin or curls as it grows, that tip can pierce the follicle wall or re-enter the surface. The NHS notes this is most common in people with coarse or curly hair, because curly hairs are more likely to bend back toward the skin as they regrow.
Does shaving against the grain cause ingrown hairs?
It makes them more likely. Shaving against the grain cuts the hair below the surface of the skin, leaving a short, sharp tip that can grow sideways or curl back in before it clears the follicle. A first pass with the grain cuts the hair closer to skin level rather than under it, which is one of the easiest ways to reduce ingrown hairs while still getting a clean result.
How do I prevent ingrown hairs when shaving?
Prepare the skin with warm water and a good lather, use a sharp blade with light pressure, shave with the grain on your first pass, and avoid going over the same spot repeatedly. Gentle exfoliation a day or so after shaving helps lift hairs that are starting to grow back so they emerge cleanly. The American Academy of Dermatology recommends not pulling the skin taut, since that can let the cut hair retract below the surface.
What is the difference between ingrown hairs and razor bumps?
They overlap. Razor bumps are the raised, irritated spots that appear when ingrown hairs inflame the surrounding skin, and the medical term is pseudofolliculitis barbae. So an ingrown hair is the trapped hair itself, while a razor bump is the inflamed reaction around it. We cover the distinction, and how each differs from plain razor burn, in razor bumps vs razor burn.
Should I dig out an ingrown hair?
No. Picking, squeezing, or digging at an ingrown hair with tweezers or a needle can push bacteria in, scar the skin, and make things worse. Most ingrown hairs work their way out on their own within a week or two if you stop shaving that area and let it settle. If the hair is clearly visible just under the surface, a warm compress can help, but anything painful, pus-filled, or spreading should be seen by a pharmacist or doctor.
Can curly hair make ingrown hairs worse?
Yes. Curly and coarse hair naturally grows in a curved path, so a freshly cut curly hair is far more likely to bend back toward the skin and re-enter it. This is why ingrown hairs and razor bumps are more common on the neck and along the jaw, and why people with curly hair often benefit from shaving with the grain only and shaving a little less often.
Written by Tom Hartley. Reviewed by Marcus Webb.
Our guides are written from personal experience and reviewed by a master barber for accuracy. Read our editorial policy.