Eyebrow threading is generally safe and is considered one of the gentlest hair removal methods available. Unlike waxing, it doesn’t peel or traumatize the top layers of skin, and unlike chemical depilatories, it introduces no potentially irritating substances to your face. That said, threading does carry some risks, mostly tied to hygiene practices and your skin’s sensitivity.
How Threading Works on Your Skin
A practitioner twists a cotton thread into a loop, rolls it across the surface of your skin, and catches hairs in the twist. The thread lifts hair directly from the follicle in one quick motion. Because the thread only grips hair, not skin, it avoids the tearing and lifting that can happen with wax. There’s no heat, no resin, and no chemicals involved.
This makes threading notably different from waxing, where adhesive strips bond to both hair and the outermost layer of skin before being pulled away. That double grip is what causes the redness, rawness, and occasional skin lifting that waxing is known for. Threading sidesteps all of that, which is why it’s often recommended for people with sensitive or reactive skin.
Risks That Can Come Up
Threading is still a physical process that creates micro-trauma. Every time a hair is yanked from its follicle, the follicle is briefly open and vulnerable. The most common side effect is temporary redness (called erythema) during and immediately after the session. This typically fades within an hour or two.
The more significant risks are tied to hygiene rather than the technique itself. When threading is performed with unclean thread, unwashed hands, or shared tools, it can introduce bacteria or viruses into those freshly opened follicles. Documented complications include:
- Folliculitis: infected hair follicles that appear as clusters of small, pus-filled bumps. They can be itchy, burning, or tender to the touch.
- Pseudofolliculitis: ingrown hairs that curl back into the skin and cause inflamed, painful bumps.
- Bullous impetigo: a bacterial skin infection that causes fluid-filled blisters, typically from staph bacteria introduced during the procedure.
- Flat warts (verruca plana): viral warts that can spread across the brow area if the thread carries the virus from one client to another.
- Molluscum contagiosum: a viral infection causing small, dome-shaped bumps on the skin.
- Pigmentation changes: repeated threading can sometimes cause darkening or lightening of the skin in the threaded area over time.
These complications are uncommon when proper sanitation is followed. But they do happen, and most cases trace back to the salon’s hygiene standards rather than threading as a technique.
What Clean Threading Looks Like
Cosmetology regulations (which vary by state) require practitioners to wash their hands with antimicrobial soap or use hand sanitizer with at least 70% alcohol before each client. All implements that contact skin must be disinfected with a solution that kills bacteria, viruses, and fungi. Any tool that touches blood or bodily fluids requires an even stronger EPA-registered disinfectant.
When you sit down for a threading appointment, a few things signal good hygiene. The practitioner should use a fresh piece of thread, not one that’s been sitting around or used on someone else. They should wash or sanitize their hands in front of you. The area around your brows should be cleaned before starting. If you notice reused thread, dirty hands, or a generally unkempt workspace, those are reasons to leave. Most complications from threading are preventable with basic sanitation.
Why Threading Is Often Safer for Sensitive Skin
If you’re using retinol, tretinoin, or isotretinoin (Accutane), waxing is typically off the table. These medications thin the skin enough that hot wax can tear it. Threading avoids this problem entirely because nothing adhesive touches your skin. It’s the standard recommendation for hair removal while on skin-thinning medications.
People with eczema, rosacea, or generally reactive skin also tend to tolerate threading better than waxing. Since the thread only contacts hair, there’s no risk of an allergic reaction to wax ingredients, and the mechanical irritation is limited to the follicle itself rather than a broad patch of skin.
What to Expect Afterward
Some redness and mild sensitivity right after threading is normal. Most people find it resolves within a couple of hours. To help your skin recover and avoid complications, keep a few things in mind for the first 24 to 48 hours:
- Skip heat exposure. Avoid saunas, hot baths, sunbathing, and tanning beds for at least 24 hours. Heat opens pores further and increases the chance of irritation or infection.
- Hold off on makeup. Keep perfumed products and cosmetics off the threaded area for at least 2 to 4 hours. Freshly opened follicles can absorb irritants more easily.
- Avoid swimming and spray tans. Chlorine and tanning chemicals can irritate freshly threaded skin for 24 to 48 hours.
If you develop small bumps that look like pimples around the brow area in the days following your appointment, that’s likely mild folliculitis. It often clears on its own within a week. Bumps that worsen, spread, fill with pus, or become increasingly painful may indicate a bacterial infection that needs treatment.
Threading vs. Other Hair Removal Methods
Compared to the alternatives, threading sits at the gentler end of the spectrum. Waxing removes a thin layer of skin along with the hair, which makes it more irritating but also means it exfoliates the area. Tweezing pulls individual hairs one at a time, which is precise but slow and can distort the follicle if done carelessly. Threading falls in between: it can remove a clean line of multiple hairs at once like waxing, but with the skin-sparing gentleness closer to tweezing.
All methods that pull hair from the root carry some risk of folliculitis and ingrown hairs. Threading doesn’t eliminate these risks, but because it grips the hair close to the skin surface and extracts it quickly, it tends to cause less follicle distortion than repeated tweezing. The speed of the technique also means less overall handling of the skin.
For most people, threading is one of the safest ways to shape eyebrows. The technique itself causes minimal skin trauma. The real variable is the person performing it and how seriously they take sanitation.