Your First Hair Loss Consultation: A Walk-Through

What happens during the conversation part of the visit?

Before anyone touches your scalp, the clinician will ask detailed questions about your history. A thorough hair loss evaluation includes a comprehensive clinical history covering when the shedding or thinning began, whether it came on suddenly or gradually, where on your scalp it is happening, and whether anyone in your family has similar hair loss 1Ref 1American Academy of Dermatology (2024).Hair Loss: Diagnosis and Treatment.Comprehensive clinical history and physical examination as the foundation of hair loss evaluation; blood tests for thyroid, iron, and vitamins; scalp biopsy when needed; dermatologist referral for complex cases.

Hormonal changes — pregnancy, thyroid issues, menopause — are frequently relevant, so expect those to come up. Bring a complete list of all medications and supplements, because several common drugs (including some blood pressure medications, anticoagulants, and cholesterol drugs) contribute to hair shedding. Recent significant stress, illness, or major weight loss may also be relevant.

What does the scalp and hair exam involve?

After the history, the clinician will look closely at your scalp and hair. Dermatologists widely use a handheld magnifying instrument — a dermatoscope — to perform trichoscopy: a noninvasive examination of hair shafts, scalp surface, and follicle openings at 10× to 70× magnification 2Ref 2Mubki T, Rudnicka L, Olszewska M, Shapiro J (2014).Evaluation and diagnosis of the hair loss patient: part II. Trichoscopic and laboratory evaluations.Trichoscopy as a simple, noninvasive tool that reveals type-specific findings in alopecia areata, androgenetic alopecia, scarring alopecias, and other conditions, often avoiding biopsy. This is painless and takes just a few minutes.

Trichoscopic findings are specific to different hair loss types: for example, exclamation-mark hairs and yellow dots point toward alopecia areata, while hair diameter variability suggests androgenetic alopecia, and absence of follicle openings signals scarring. In many cases trichoscopy provides enough diagnostic information to avoid a scalp biopsy 2Ref 2Mubki T, Rudnicka L, Olszewska M, Shapiro J (2014).Evaluation and diagnosis of the hair loss patient: part II. Trichoscopic and laboratory evaluations.Trichoscopy as a simple, noninvasive tool that reveals type-specific findings in alopecia areata, androgenetic alopecia, scarring alopecias, and other conditions, often avoiding biopsy.

Some clinicians also do a gentle pull test, lightly tugging a small cluster of hairs to see how many release — more than expected can indicate an active shedding phase. Photographs may be taken for your record to serve as a visual baseline for future visits.

What blood tests might be ordered?

If the clinician suspects that the cause of your hair loss could be a systemic condition — thyroid disease, anemia, vitamin deficiency, or hormone imbalance — they will order a blood draw 1Ref 1American Academy of Dermatology (2024).Hair Loss: Diagnosis and Treatment.Comprehensive clinical history and physical examination as the foundation of hair loss evaluation; blood tests for thyroid, iron, and vitamins; scalp biopsy when needed; dermatologist referral for complex cases. Common tests include:

• TSH (thyroid-stimulating hormone): to screen for hypothyroidism and hyperthyroidism
• Ferritin and complete blood count: iron deficiency is a common and underrecognized cause of diffuse shedding
• Vitamin D: low levels have been associated with some forms of alopecia
• Androgens (free and total testosterone, DHEA-S): if polycystic ovary syndrome or androgen-related hair loss is suspected in women
• ANA and other autoimmune markers: if a systemic autoimmune cause is considered

Not every test is needed in every situation — the clinical history and exam findings guide which panel is ordered. A 2026 retrospective analysis found that broad laboratory screening for telogen effluvium had limited diagnostic utility, reinforcing that targeted testing based on history performs better than reflexive broad panels 3Ref 3PMC Study Group (2026).Broad laboratory testing does not show utility for telogen effluvium: A retrospective analysis of 22-million laboratory results using TriNetX.Targeted laboratory testing based on clinical history outperforms broad reflexive panels for telogen effluvium diagnosis; reinforces history-guided test selection.

What might you be told — and what happens next?

Hair loss has many causes, and the clinician may be able to give you a working diagnosis at the first visit, especially if the pattern is classic — for example, the typical recession at the temples and crown that characterizes male-pattern hair loss, or the widening central part of female-pattern hair loss.

For other types, a blood draw, scalp culture, or scalp biopsy may be recommended before treatment decisions are made. You will not always leave with a final answer on day one, but you should leave understanding what the leading possibilities are and what the next step is. The AAD recommends seeing a board-certified dermatologist when hair loss has a complex or unclear cause, as primary care may refer for specialist evaluation 1Ref 1American Academy of Dermatology (2024).Hair Loss: Diagnosis and Treatment.Comprehensive clinical history and physical examination as the foundation of hair loss evaluation; blood tests for thyroid, iron, and vitamins; scalp biopsy when needed; dermatologist referral for complex cases.