Most men jump straight from "my hair feels thinner" to "I need finasteride" without stopping to confirm they even have the type of hair loss finasteride treats. It's an understandable shortcut — the odds favor pattern loss — but a 5-minute self-assessment saves you from wasting 6 months on the wrong protocol.
This guide walks through how to actually look at your scalp, what to look for, how to stage what you see, and when the pattern you're seeing doesn't fit and you should see a dermatologist instead.
What You're Trying to Distinguish
The broad categories of male hair loss, roughly in order of prevalence:
- Androgenetic alopecia (AGA) — "male pattern baldness." DHT-driven miniaturization. Progressive, patterned (hairline, crown), usually starting age 25–45. ~95% of male hair loss cases.
- Telogen effluvium (TE) — stress-triggered mass shed. Diffuse thinning, not patterned, usually with a clear trigger (illness, surgery, crash diet, major stressor) 2–4 months prior. Usually self-resolves.
- Alopecia areata — autoimmune, causes distinct round patches of complete hair loss. Patches may enlarge or regrow spontaneously.
- Traction alopecia — repeated pulling (tight hairstyles, constant hat wear, hair pulling habit). Loss follows the tension pattern.
- Scarring alopecias — lichen planopilaris, frontal fibrosing alopecia, central centrifugal cicatricial alopecia. The scalp often looks shiny, smooth, inflamed, or scarred where hair is lost. These are dermatologist cases — early diagnosis matters because scarring alopecias can become permanent.
Pattern loss responds to the minoxidil + finasteride stack. The others don't — or they do so incidentally while missing the actual problem.
The Miniaturization Test
This is the single most useful self-assessment. It tells you whether you have pattern loss vs diffuse thinning in about 60 seconds.
Androgenetic alopecia progresses through miniaturization: full-thickness terminal hairs get progressively shorter and thinner across multiple growth cycles until they become wispy vellus hairs, then nothing. The hallmark is variable hair caliber in the affected zones — short thin hairs sitting next to normal ones.
Other types of loss don't miniaturize. Telogen effluvium causes uniform shedding of full-thickness hairs. Alopecia areata causes complete loss in patches, not gradual thinning.
How to do the test
- Sit under a bright bathroom light. Use a small handheld mirror to examine your scalp up close.
- Part your hair and look at the hair emerging from the scalp in three zones: front hairline, temples, and crown.
- Compare those zones to the back of your head just above the nape — the "donor zone" that's genetically resistant to DHT and stays thick even in advanced pattern loss.
- Look for variability. In pattern loss zones: mix of full-thickness, medium, short, and fine hairs. In the donor zone: uniform full-thickness hairs.
If your hairline/crown hairs look uniformly thin but there's no mix of short miniaturized hairs, you might not have AGA. See a dermatologist.
USB Digital Dermatoscope / Scalp Scope (50–200x zoom)
This is the $25 tool that turns self-assessment from guesswork into actual data. Plug into your phone or laptop, magnify your scalp, and you can see miniaturization patterns clearly. Also the best way to track progress — take the same shot monthly at the same zoom and you'll see regrowth that's invisible to the naked eye.
Staging Yourself on the Norwood Scale
The Norwood-Hamilton scale is the standard classification for male pattern loss. It's a 1–7 progression based on hairline recession and crown thinning patterns. Here's the self-assessment shorthand:
| Norwood | Hairline | Crown | Notes |
|---|---|---|---|
| NW 1 | Juvenile hairline, no recession | Full | Baseline. Most men leave NW1 by age 25–30. |
| NW 2 | Slight temple recession ("mature hairline") | Full | Normal age-related change; not necessarily balding. |
| NW 3 | Clear temple recession, hairline moved back | Slight crown thinning may appear | First stage where treatment is clearly indicated. |
| NW 3 Vertex | NW3 hairline | Obvious crown bald spot | Crown becomes a focal point. |
| NW 4 | Deeper recession into M or U shape | Larger crown area | Front and crown still separated by hair. |
| NW 5 | Narrowing bridge between hairline and crown | Expanded crown | The "island" of front hair is shrinking. |
| NW 6 | Bridge is gone; front and crown connected | Large bald area across top | Only sides and back remain. |
| NW 7 | Horseshoe of hair around sides and back only | Fully bald top | Most advanced pattern. |
How to check each view
- Front: Stand facing a mirror in good light, hair pushed back off your forehead. Measure from the center of your hairline down to the midpoint between your eyebrows. Under 6 cm usually = no meaningful recession. 6–8 cm = mature hairline territory. >8 cm = NW3+.
- Temples: Same mirror, turn 30° left and right. Look at the angle of your temple hairline. A deep inward slant = NW2+ recession.
- Crown: This is the hard one. Use a second mirror, or take a phone photo aimed down at the top of your head. Most men are surprised at their crown because they've never actually looked at it.
- Top view: Full overhead shot. Look for density loss across the midline of your skull (vertex to frontal).
Take four baseline photos day 1 of treatment: front (hairline straight on), left temple, right temple, crown (phone aimed down at scalp). Same lighting, same angle, dry hair, no product. Repeat monthly. This is the single most important data you'll collect in your regrowth journey — don't skip it.
Shed Count Test: Is It Pattern Loss or a Temporary Shed?
Normal daily shedding is 50–100 hairs per day. This fluctuates with season, stress, hormonal state. Losing more than this for a short period isn't alarming.
Here's a rough self-test: for three days, count hairs you see in the shower drain, on your pillow, and in your hairbrush. Average them.
- Under 100/day: Normal.
- 100–150/day for a few weeks: Mild shed, possibly seasonal or mild TE.
- 150+/day for 2+ months: Active telogen effluvium. Look for a trigger 2–4 months back — illness, surgery, major stressor, crash diet, new medication, thyroid issue. TE usually self-resolves in 6–9 months.
- Gradual thinning without a shed spike: Classic pattern loss trajectory. You're not losing dramatically; you're miniaturizing slowly.
Pattern loss and TE can coexist. If you're in your 30s with a family history of pattern loss and you also just recovered from surgery, you might be dealing with both.
Care Bare Rx: Physician Evaluation for Unclear Cases
If your self-assessment is ambiguous — patchy loss, unusual pattern, sudden onset, or scalp symptoms — a physician evaluation is worth the free consult. Care Bare Rx's licensed MDs can confirm whether you're dealing with pattern loss or something else, and prescribe accordingly.
Start Free Consult →Red Flags: Stop Self-Treating, See a Dermatologist
The self-assessment above works great for textbook pattern loss. These findings mean your situation isn't textbook and you need an in-person derm:
- Round, smooth, complete bald patches that appeared over days or weeks → probable alopecia areata
- Painful, itchy, or burning scalp where hair is being lost → possible scarring alopecia
- Shiny, smooth, "doll scalp" appearance where follicle openings are missing → likely scarring alopecia (permanent without early intervention)
- Scaling, flaking, or plaques under the loss areas → possible scalp psoriasis or seborrheic dermatitis
- Diffuse severe loss with no family history of pattern loss → probable TE from an underlying trigger (thyroid, iron, vitamin D, autoimmune)
- Accompanying body hair or eyebrow loss → alopecia universalis, frontal fibrosing alopecia, or other systemic cause
A dermatologist can do a trichoscopy (scalp microscopy) and scalp biopsy if needed. These are 15-minute office procedures and they diagnose in a way no self-assessment can.
The Bottom Line
The 5 minutes you spend genuinely examining your scalp before starting treatment is the highest-ROI time in your entire regrowth journey. It confirms you're treating the right thing, gives you a baseline to measure against, and catches the 5% of cases that aren't pattern loss before you waste months on the wrong protocol.
If you've confirmed pattern loss and staged yourself on Norwood, the next step is picking a protocol. The stack protocol →