4.5 Hair Loss (Alopecia) and Hair Shaft Disorders: Types, Signs and Treatments
Key Takeaways
Androgenetic alopecia (male pattern baldness) is the most common form of hair loss in men; it progressively miniaturizes follicles at the temples and crown and is staged on the Hamilton–Norwood scale.
Alopecia areata is a non-contagious autoimmune condition that causes sudden, smooth, round or oval bald patches; it can affect the beard, the whole scalp (totalis) or the whole body (universalis).
Traction alopecia comes from repeated tension from tight braids, ponytails, locs or hair-system attachments; it can reverse if caught early but may become permanent.
Topical minoxidil is approved for over-the-counter sale for hair regrowth, while oral finasteride 1 mg for male pattern hair loss requires a prescription.
Trichoptilosis is split ends, trichorrhexis nodosa is knotted hair with nodular breaks, monilethrix is beaded hair and fragilitas crinium is brittle hair.
Why Hair Disorders Are on the Exam
The NIC Barber 1 outline asks candidates to identify signs and symptoms of conditions, disorders and diseases related to hair, and their types and treatments. Many clients ask their barber first about thinning, patches or breakage. Your job is to recognize what you see, adapt the service, and refer medical questions to a physician or dermatologist. A barber does not diagnose or prescribe.
Normal Hair Versus Hair Loss
- Vellus hair is short, fine, usually unpigmented "peach fuzz" without a medulla. Terminal hair is the longer, coarser, pigmented hair of the scalp, beard, brows and body. In pattern hair loss, terminal hairs gradually shrink back toward vellus-like hairs. This is called miniaturization.
- Losing about 50 to 100 hairs a day is normal shedding of telogen (resting-phase) hairs (Section 4.2). Hair loss becomes a concern when shedding increases noticeably, or when the scalp shows thinning or bald areas.
| Type | Cause | What you see | Course |
|---|---|---|---|
| Androgenetic alopecia (male or female pattern baldness) | Genetic sensitivity of follicles to androgens, especially dihydrotestosterone (DHT) | Men: receding temples and thinning crown, progressing over years. Women: diffuse thinning with a widening part | Progressive; staged in men on the Hamilton–Norwood scale |
| Alopecia areata | Autoimmune attack on anagen follicles | Sudden, smooth, round or oval patches, often with short "exclamation-point" hairs at the edges; can involve the beard | Unpredictable; may regrow. Alopecia totalis is loss of all scalp hair; alopecia universalis is loss of all body hair. Not contagious |
| Telogen effluvium | A shock pushes many follicles into telogen: high fever, surgery, childbirth (postpartum alopecia), severe dieting, stress, some medications | Diffuse shedding that starts about two to three months after the trigger | Usually temporary once the trigger resolves |
| Traction alopecia | Repeated pulling from tight braids, cornrows, ponytails, locs, heavy extensions or hair-system attachments | Thinning along the hairline and temples, sometimes with small bumps | Reversible early; permanent if tension continues |
| Cicatricial (scarring) alopecia | Follicles destroyed by inflammation, infection (such as favus), burns or injury | Smooth, shiny patches with no visible follicle openings | Permanent |
| Trichotillomania | Compulsive hair pulling | Irregular patches of broken hairs of different lengths | Needs medical or behavioral care |
Warning
Sudden patchy loss, scaling, redness, pustules or broken "black dot" hairs can also be signs of tinea capitis, which is contagious (Section 4.4). When in doubt, do not proceed. Refer the client to a physician.
Treatments a Barber Should Know About
You will not prescribe anything, but the exam expects you to know which options exist and who provides them.
| Option | Who provides it | Key facts |
|---|---|---|
| Topical minoxidil | Over the counter | FDA-approved for hair regrowth; 2% and 5% strengths; results take months, and stopping it reverses the gains |
| Oral finasteride 1 mg | Prescription (physician) | Approved for male pattern hair loss; works by reducing DHT |
| Prescription JAK inhibitors | Prescription (dermatologist) | Approved since 2022 for severe alopecia areata |
| Low-level laser devices | Over the counter, FDA-cleared | Combs, caps or helmets used at home |
| Hair transplantation | Surgeon | Moves follicles from the back and sides of the scalp, which are resistant to DHT, to thinning areas |
| Hair replacement systems | Barber or hair-system specialist | Non-surgical hairpieces bonded or clipped in place (Section 8.3) |
| Haircut strategy | Barber | Shorter tapers, textured crops and a clean head shave all reduce the contrast between thin and full areas |
A Hair-Loss Consultation Script
- Ask open-ended questions: "When did you first notice the change? Has anything changed in your health or routine?"
- Describe what you see, not a diagnosis: "I can see the hair is finer at the crown than at the sides."
- Offer choices within your scope: haircut adjustments, product suggestions, scalp treatments or a hair-system consultation.
- Refer medical questions to a dermatologist, especially sudden, patchy or inflamed loss.
- Record your observations on the client record card so you can compare them at the next visit.
Hair-Shaft Disorders
| Disorder | Description | Barbering response |
|---|---|---|
| Canities | Gray or white hair caused by loss of melanin. Congenital canities is present at birth; acquired canities develops with age or, less often, after illness or shock | No treatment needed; color services are within the Virginia barber scope |
| Ringed hair | Alternating bands of gray and pigmented hair along the shaft | Cosmetic only |
| Hypertrichosis (hirsuties) | Abnormal growth of terminal hair where normally only vellus hair grows | Refer for medical evaluation if it appears suddenly; remove hair only within your license scope |
| Trichoptilosis | Split ends | Cut the damaged ends off; condition the hair; reduce heat |
| Trichorrhexis nodosa | Knotted hair: brittle hair with nodular swellings where the shaft breaks easily | Gentle handling, conditioning, avoiding harsh chemicals and heat |
| Monilethrix | Beaded hair: hereditary, with bead-like nodes and constrictions where the hair breaks | Gentle handling and conditioning; refer for evaluation |
| Fragilitas crinium | Brittle hair that splits at any point along the shaft | Conditioning treatments; cut off damaged lengths |
Memory hooks: trich- means hair; -ptilosis sounds like "split"; nodosa means knots; monile- means necklace (beads); fragilitas means fragile.
A client has a smooth, round bald patch about the size of a quarter in his beard that appeared within two weeks. The skin is not scaly or inflamed, and short broken hairs taper toward the scalp at the edge. Which condition do these signs most closely match?
Androgenetic alopecia
Traction alopecia
Alopecia areata
Trichoptilosis
Which hair-loss treatment can a client buy over the counter without a prescription?
Oral finasteride 1 mg
Topical minoxidil
A JAK inhibitor for alopecia areata
Follicular unit hair transplantation
A client wears very tight cornrows continuously and shows thinning along the frontal hairline and temples. What is the most likely cause?
Traction alopecia from repeated tension on the follicles
Canities from loss of melanin
Monilethrix inherited from a parent
Telogen effluvium caused by a fever three months earlier
Sections you finish are checked off in the contents.