How to Prevent Ingrown Hairs From Shaving

If you shave regularly and get ingrown hairs regularly, the razor is almost certainly the cause: not shaving itself, but the design of the tool. Most people try different creams, skip shaves, or change their technique without addressing what actually creates the problem.

Why do you get ingrown hairs from shaving?

Multi-blade razors use a technique called hysteresis: the first blade lifts the hair, the following blades cut it below the skin's surface. The hair retracts, curls, and tries to grow through the skin wall instead of up through the follicle opening. That is the bump. A single blade cuts at surface level, so the hair retracts to the surface rather than below it.

What's actually happening

The clinical name is pseudofolliculitis barbae (PFB). The British Association of Dermatologists describes it as a foreign-body inflammatory reaction: the trapped hair behaves like a splinter, triggering swelling, tenderness, and sometimes infection around the follicle.

Multi-blade cartridges work by lifting the hair before cutting it. The first blade acts as a traction blade, pulling the hair upward so subsequent blades can sever it below the skin's surface. Once cut there, the hair's natural elasticity pulls it back beneath the surface. For people with straight hair, this sometimes resolves without incident. For people with curly or coarse hair, the retracted hair curls almost immediately and penetrates the skin wall beside the follicle. The result is a raised, inflamed bump.

PFB affects an estimated 45 to 83 per cent of Black men who shave regularly, according to research published in the Journal of the American Academy of Dermatology, and a significant minority of men with curly hair across all backgrounds. This is why changing creams or exfoliants produces limited results: the design of the multi-blade cartridge is the mechanism driving PFB.

What doesn't work (and why)

Shaving against the grain, switching to disposables, tweezing, skipping shaves, and hydrocortisone cream all leave the cause in place. Each treats a symptom or worsens the mechanics; none stops a multi-blade cartridge cutting hair below the surface, which is what creates the ingrown.

Shaving against the grain. With a multi-blade cartridge, shaving against the grain intensifies the problem. The blade lifts the hair further from the skin before cutting; the retraction is deeper. Against-the-grain shaving is not inherently wrong, but it compounds the damage when the tool is doing the lifting.

Disposable razors. Same design, lighter construction. Disposables dull faster than cartridges, which means more drag and more pressure on each stroke. They are often worse for ingrown hairs than a fresh cartridge.

Tweezers. Releasing a trapped hair manually provides short-term relief but does not address why it grew back in. Regular use of tweezers around the follicle causes micro-scarring that alters the follicle angle over time, which can make ingrown hairs more persistent.

Skipping shaves. A few days off reduces inflammation, which helps. But when you return to the same multi-blade razor, the cycle starts again. The break treats the symptom; it does not change the mechanism.

Hydrocortisone cream. Useful for settling inflammation around an existing ingrown, not for preventing new ones. It addresses the response, not the cause.

What works

Five habits prevent most shaving ingrown hairs: shave with the grain on the first pass, change the blade every five to seven shaves, prep with warmth and a proper lather, exfoliate gently on non-shaving days, and store the razor upright. Together they keep the cut at the surface, where hair can regrow cleanly.

1. Shave with the grain on your first pass. With the grain means shaving in the direction the hair grows. On the face, that is generally downward on the cheeks, jaw, and upper lip. On the neck, hair often grows upward toward the jaw or sideways, and the grain can reverse direction mid-neck. If unsure, run a finger upward from neck to chin: resistance means you are going against the grain. One with-the-grain pass removes most of the stubble and significantly reduces the risk of ingrown hairs. A second pass across or against the grain adds closeness; do it after re-lathering once technique is established.

2. Change your blade on time. A blade that has done more than five to seven shaves will drag rather than cut cleanly. Drag folds the hair rather than severing it, which increases the chance of it curling back below the surface. The test is simple: any pulling sensation means the blade is past its best. The guide on how often to change your razor blade covers the signs in detail.

3. Prepare properly before shaving. Shave during or immediately after a warm shower; if that is not possible, lay a warm damp towel on your face for a minute. Warm water softens the hair shaft, making it easier to cut cleanly at the surface. Cold or dry hair is more likely to bend under blade pressure than to sever. Use a shaving soap or cream rather than pressurised gel. Gel typically contains alcohol and propellants that dry the skin; a soap or cream builds a dense, cushioning lather that holds the hair upright and adds slip between the blade and skin. The Sandalwood Shaving Cream is alcohol-free and sulphate-free, formulated for single-blade shaving.

4. Exfoliate gently, two or three times a week. Dead skin builds up around follicle openings and can trap emerging hairs before they clear the surface. A gentle exfoliant (a soft face brush or a mild salicylic acid wash) used two or three times a week keeps those openings clear. Do this on non-shaving days where possible; exfoliating immediately before shaving sensitises the skin.

5. Store your razor upright. A wet blade oxidises faster than a dry one. Storing the razor on its head or lying flat keeps water pooled around the blade edge, accelerating dulling. A stand holds the razor upright so water drains and air circulates. A dry blade stays keener for longer, and a keener blade cuts rather than drags.

When it's not the razor

If ingrown hairs persist despite changing technique and switching tools, or if they form deep, painful cysts rather than surface bumps, see a GP or dermatologist. Severe PFB can be treated with topical retinoids (which accelerate skin cell turnover, keeping follicle openings clear), eflornithine cream (which slows hair growth), or in chronic cases, laser hair reduction. These are clinical treatments; a GP is the right referral.

Ingrown hairs that appear without shaving, on the back of the neck, down the spine, or anywhere you do not shave, may be pilonidal cysts or keratosis pilaris, which have different causes and treatments. Any skin symptom that does not improve within two weeks or worsens is worth a medical appointment.

The longer-term fix

The multi-blade lift-and-cut mechanism is the root cause of most shaving ingrown hairs. It is not a side effect of bad technique; it is how the product is designed to work. Changing the tool changes the outcome.

A single-blade safety razor cuts at or just above the skin surface. There is no lift: the blade meets the hair where it exits the follicle and severs it there. The hair retracts to the surface, not below it. For most people who switch from cartridge to single-blade shaving, ingrown hairs reduce substantially within two to three weeks: the time it takes for existing trapped hairs to clear and new growth to show that the mechanism has changed.

The Kronos Safety Razor uses an enclosed head, which covers the blade corners (the main cause of nicks in open-comb designs) and maintains a consistent cutting angle across the stroke. It is designed for people who want the performance of a single blade without the learning curve of an open razor. The razor costs £40; blades cost 10 to 16 pence each, replaced every five to seven shaves. If you have shaved with multi-blade cartridges all your life and had ingrown hairs throughout, one tool change is worth testing for a month.

Frequently asked questions

How long does an ingrown hair take to clear?

A mild ingrown resolves on its own within one to two weeks once the cause is removed. Do not pick or squeeze; that prolongs inflammation and risks scarring. Gentle exfoliation and keeping the area clean speeds the process. A warm compress applied for a few minutes can bring a shallow ingrown to the surface.

Can women get ingrown hairs from shaving?

Yes. The lift-and-cut mechanism is the same regardless of where you shave. Multi-blade cartridges on legs and underarms produce the same effect: hair severed below the skin surface, retracting and potentially curling back. Single-blade shaving on legs requires more passes but produces far fewer ingrown hairs and razor bumps over time.

Do ingrown hairs leave scars?

They can. Each ingrown that becomes infected or is scratched can leave a small area of hyperpigmentation or, in more severe cases, a flat scar. Over years of chronic PFB, cumulative scarring can alter skin texture and make future ingrown hairs more likely. Changing the tool earlier rather than later reduces the long-term damage.

Is shaving cream better than gel for ingrown hairs?

Shaving gel from a pressurised can typically contains alcohol and sulphates that dry and tighten the skin. Shaving soap or cream builds a thicker lather that holds the hair upright, adds slip, and keeps the skin hydrated throughout the shave. Thin gel rarely produces a good enough base for a single-blade shave.

Can I still shave against the grain after switching to a safety razor?

Yes, as a second pass. A with-the-grain first pass removes most stubble. Re-lather, then a second pass across or against the grain adds closeness without the ingrown-hair risk of multi-blade lift-and-cut. Start with one pass for the first few weeks; add a second once you are comfortable with the tool.