Concern library
The questions those threads keep asking
Short, plain answers, including the ones where the honest response is "a product won't fix this." Every one of these has thousands of posts behind it and not much of a straight answer.
Porosity, and why it matters more than curl type
Everyone asks whether they're 3C or 4A. Porosity is the more useful question, and it's why the product that transformed your friend's hair does nothing for yours.
- Low porosity: water beads and rolls off, hair takes forever to get wet and forever to dry. Products sit on top. You need lightweight formulas, warm water, and regular clarifying.
- High porosity: soaks water instantly, dries fast, always thirsty. Usually from color, heat, or damage. You need sealing. Creams, butters, and oils on top of leave-in.
- The test: run a section under water. Slow to wet means low. Instantly soaked means high. Skip the glass-of-water float test, it's unreliable.
- Or take the test. The hair porosity test asks six questions about what your hair already does and shows its own working.
What to look at: Cantu Avocado Hydrating Cream Conditioner, around $6, Cantu Hydrating Cream Conditioner, around $6, Cantu TXTR Curl Foam, around $10, Any single-ingredient brand 100% Jojoba Oil, around $10, SheaMoisture Curl & Shine Conditioner, around $11, SheaMoisture Co-Wash Conditioning Cleanser, around $11. See the whole directory.
Protein or moisture. How to tell which you need
The single most common reason a routine that was working suddenly stops.
- Needs moisture: a wet strand snaps almost immediately with no stretch. Hair feels rough, straw-like, brittle.
- Needs protein: a wet strand stretches a long way and doesn't spring back, or feels gummy and mushy. Curls have gone limp and stringy.
- Protein overload looks a lot like dryness, stiff, crunchy, dull. If you've been using repair products and things got worse, stop the protein for a month.
- Most people need both, alternating. Deep moisture weekly, protein every third or fourth wash.
What to look at: Any single-ingredient brand 100% Jojoba Oil, around $10, Mielle Organics Strengthening Shampoo, around $11, Mielle Organics Nourishing Shampoo, around $11, Mielle Organics Deep Conditioner, around $11, SheaMoisture Co-Wash Conditioning Cleanser, around $11, SheaMoisture Protein-Free Shampoo, around $12. See the whole directory.
Thinning edges and hair loss
The most-asked and most-badly-answered question in every hair group.
- Traction alopecia comes from tension. Tight braids, weaves, wigs, ponytails, edge control pulled hard. Reversible early. Permanent once the follicle scars.
- The warning sign is pain or little bumps at the hairline on install day. If it hurts, it is too tight. That is not a normal part of getting your hair done.
- Shedding everywhere rather than at the hairline is usually something else entirely: thyroid, iron, postpartum, stress or medication. That needs bloodwork, not a growth oil.
- Honest version: castor oil and rosemary oil may help a little. Minoxidil has real clinical evidence. Neither regrows a scarred follicle. If it has been receding six months or more, see a dermatologist before spending more.
What to look at: Eco Style Professional Styling Gel, around $5, Mielle Organics Strengthening Hair Oil, around $10, Kitsch Satin Scrunchies & Claw Clips, around $10, Mielle Organics Strengthening Shampoo, around $11, SheaMoisture Strengthen & Restore Treatment Masque, around $13, The Mane Choice Growth Stimulating Scalp Serum, around $14. See the whole directory.
Dark marks that last for months after a breakout
Post-inflammatory hyperpigmentation. Extremely common in deeper skin and constantly mistaken for scarring.
- It is pigment, not a scar. Flat and brown or black means it will fade. Indented or raised means texture, which is a different treatment.
- Treating the acne is step one. New breakouts make new marks faster than any serum fades old ones.
- What works: azelaic acid, tranexamic acid, alpha arbutin, niacinamide, and gentle retinoids. Slowly. One at a time.
- Sunscreen is doing half the work. Without it you are fading spots at night and re-darkening them by lunch.
- Timeline: eight to twelve weeks minimum. Three to six months for older marks. Nothing legitimate is faster.
What to look at: L.A. Girl HD Colour Corrector, around $5, COSRX Acne Pimple Master Patch (24ct), around $6, The Ordinary Niacinamide 10% + Zinc 1%, around $7, e.l.f. 16HR Camo Concealer, around $7, The Ordinary Alpha Arbutin 2% + HA, around $9, The Ordinary Azelaic Acid Suspension 10%, around $11. See the whole directory.
Dark underarms
Thousands of posts, almost all of them recommending something that makes it worse.
- Often it is not pigment at all. Stubble under thin skin reads as shadow. Try trimming instead of a close shave for a month and see what changes.
- Common causes: friction from tight clothes, irritation from antiperspirant, aggressive shaving, and old irritation that healed darker.
- Cheapest first move: switch to a gentle, fragrance-free or AHA deodorant and use a fresh blade with shaving cream, shaving in the direction of growth.
- Never: lemon juice, baking soda, toothpaste, or bleach. They cause chemical burns, and burns heal darker than what you started with.
- Worth a doctor: velvety dark patches appearing suddenly on the neck and underarms can be acanthosis nigricans, which is linked to insulin resistance.
What to look at: Dove 0% Aluminum Deodorant, Sensitive, around $6, Dove Sensitive Skin Beauty Bar / Body Wash, around $8, Vanicream Aluminum-Free Deodorant, around $8, Schmidt's Sensitive Skin Deodorant (magnesium, baking soda free), around $9, Curie Aluminum-Free Deodorant Stick, around $12, Native Aluminum-Free Deodorant, around $13. See the whole directory.
The bumps on the backs of your arms
Keratosis pilaris. Around one in three people have it. It is not acne and scrubbing makes it angrier.
- What it is: keratin plugging the follicle. Genetic, harmless, and it flares in winter.
- What works: a lactic acid or salicylic acid lotion, consistently, plus moisturizer. Three to four times a week.
- What doesn't: harsh physical scrubs, which add redness on top of the bumps.
- Expectation: dramatically less visible, not gone. It comes back if you stop.
What to look at: The Ordinary Salicylic Acid 2% Solution, around $8, The Ordinary Glycolic Acid 7% Exfoliating Toner, around $14, CeraVe Hydrating Cream-to-Foam Body Wash, around $14, Gold Bond Rough & Bumpy Daily Therapy Cream, around $14, Eucerin Roughness Relief Lotion (urea), around $14, CeraVe SA Lotion for Rough & Bumpy Skin, around $16. See the whole directory.
Dark knees, elbows, and ankles
Thicker skin, more friction, more dead cell buildup. Half the fix is exfoliation, half is sun.
- Start with exfoliation: a lactic acid body lotion daily beats any scrub.
- Then moisture: on damp skin, within three minutes of the shower. That timing matters more than which cream.
- Then sunscreen: knees and elbows get constant sun exposure, which is why they re-darken faster than everything else you treat.
- Kneeling and leaning on hard surfaces keeps it going. Worth noticing your habits.
What to look at: NIVEA Cocoa Butter Body Lotion, around $7, Vaseline Advanced Repair Body Lotion, around $8, SheaMoisture African Black Soap Body Wash, around $9, Tree Hut Shea Sugar Body Scrub, around $9, Eucerin Advanced Repair Body Cream, around $13, CeraVe Hydrating Cream-to-Foam Body Wash, around $14. See the whole directory.
Straight-haired parent, curly kid
A genuinely hard situation with a lot of bad advice attached.
- Stop washing it daily. Once a week, sometimes less. Curly hair is dry by nature and shampoo is the enemy of that.
- Detangle wet, with conditioner in it, from the ends upward, with fingers or a flexible detangling brush. Never dry, never from the roots down.
- Leave-in goes on soaking wet hair, not damp, not dry. The water is the moisture. The product just holds it there.
- Satin pillowcase or bonnet. Cotton undoes everything overnight and causes most of the morning tangles.
- Don't brush it dry. That's what turns defined curls into a frizz halo.
- Kids' curls are often finer than an adult's. A lighter line frequently works better than the heavy type 4 products.
What to look at: Cantu Tear-Free Nourishing Shampoo, around $6, Cantu Coconut Curling Cream, around $6, Any seamless brand Seamless Wide-Tooth Comb, around $8, Any single-ingredient brand 100% Jojoba Oil, around $10, Kitsch Satin Scrunchies & Claw Clips, around $10, Mielle Organics Deep Conditioner, around $11. See the whole directory.
Sunscreen that doesn't leave a grey cast
"I gave up on sunscreen" is almost always about white cast, and it is a completely valid reason.
- Chemical filters are clear and cast nothing. Modern Korean, Japanese, and European formulas are the most elegant.
- Mineral zinc is what causes the cast, unless it's tinted, which cancels it with pigment.
- Tinted is better for melasma specifically, because the iron oxides block visible light as well as UV.
- Reapplication: a powder or stick over makeup is far more realistic than nothing at all.
What to look at: Maybelline Express Brow Fast Sculpt Gel, around $8, innisfree Daily UV Defense Sunscreen SPF36, around $15, Beauty of Joseon Relief Sun: Rice + Probiotics SPF50+ PA++++, around $18, Black Girl Sunscreen Broad Spectrum SPF 30, around $19, Round Lab Birch Juice Moisturizing Sun Cream SPF50+, around $20, Black Girl Sunscreen Body Sunscreen SPF 30, around $22. See the whole directory.
"My products stopped working"
Usually one of four things, in this order of likelihood.
- Buildup. Especially on low porosity hair, or with heavy butters and gels. Clarify and see if everything comes back.
- Protein-moisture balance flipped. See the strand test above.
- Hard water. Mineral deposits coat the hair. A chelating shampoo or a shower filter fixes it.
- The season changed. Winter needs heavier product than summer. Same hair, different weather.
What to look at: Any silicone brand Silicone Scalp Massager, around $9, Olaplex Clarifying Shampoo, around $32, Briogeo Charcoal + Tea Tree Scalp Shampoo, around $32, Any KDF-55 brand Shower Head Filter, around $40. See the whole directory.