Alopecia Areata vs. Androgenetic Alopecia: Two Completely Different Diseases
Both cause hair loss. They're commonly confused. The diagnosis determines the entire treatment path — and using the wrong one accomplishes nothing. Here's how to tell them apart.
They both cause hair loss. They're often confused by the men experiencing them. But alopecia areata and androgenetic alopecia are fundamentally different diseases — with different causes, different looks, and completely different treatment paths. Confusing them means treating the wrong thing for months.
01Androgenetic alopecia: the hormone-driven kind
AGA (male pattern baldness) is a genetic-hormonal process. DHT miniaturizes genetically susceptible follicles in a predictable pattern — recession at the temples, thinning at the crown, progressing along the Norwood stages. Loss is gradual, diffuse within those zones, and permanent without treatment. It's the most common cause of hair loss in men, affecting roughly half of men by age 50.
02Alopecia areata: the autoimmune kind
Alopecia areata (AA) is the immune system attacking its own hair follicles. It presents very differently: typically sudden, patchy, circular or oval areas of complete hair loss — not the gradual recession of AGA. The scalp often looks and feels completely normal within the bald patch (no scaling, no redness). It can affect any hair-bearing area, including beard and eyebrows.
AGA follows a predictable recession pattern (Norwood stages). Alopecia areata creates discrete round patches that can occur anywhere. If you have a circular bald spot with smooth skin and an otherwise intact hairline, that's not pattern baldness — get it evaluated.
03Treatment: completely different roads
| AGA | Alopecia Areata | |
|---|---|---|
| Cause | DHT + genetics | Autoimmune |
| First-line treatment | Minoxidil + finasteride | Corticosteroid injections, JAK inhibitors |
| Reversible? | Partially — maintenance, not cure | Often yes; spontaneous regrowth common in mild cases |
| Prognosis | Progressive without treatment | Unpredictable; can resolve, recur, or progress |
| Surgery option | Yes, for stable cases | Usually not; active AA may attack transplanted grafts |
04The JAK inhibitor development for AA
The treatment landscape for AA changed significantly with FDA approval of three JAK inhibitors for severe cases: baricitinib (Olumiant, 2022), ritlecitinib (Litfulo, 2023), and deuruxolitinib (Leqselvi, 2024). These target the immune pathway that drives follicle attack. Results in trials have been impressive for severe/extensive AA. They're not AGA treatments — but for men with confirmed autoimmune hair loss, they represent a genuine advance.
Get a proper diagnosis first
Sesame Care
Telehealth evaluation — diagnosis before treatmentSame-day telehealth visits for FDA-approved hair-loss prescriptions, from $44.
Sesame connects you with providers for FDA-approved, brand-name medications — no compounded products.
See Sesame Care options Paid linkCare Bare Rx
Provider consult for hair loss type assessmentTelehealth hair-loss intake with prescription minoxidil and finasteride options.
See Care Bare Rx options Paid linkIf you haven't been formally diagnosed, get the diagnosis. Using finasteride for alopecia areata accomplishes nothing; using corticosteroids for AGA accomplishes nothing. The right treatment depends entirely on which disease you have — and they're not always obvious without a trained eye.
Affiliate disclosure. Male Hair Advice may earn a commission when you use the links marked “Paid link,” at no additional cost to you. We only include providers we believe are relevant to the topic, and commercial relationships never change our editorial assessments.