Workup of pattern hair loss in men and women
| History |
| Age of onset, time course, severity, hair loss distribution, progression (periods of shedding), accompanying symptoms |
| Medical history |
| Gynecologic history |
| Medication and supplement list |
| Family history of hair loss, androgen excess, and metabolic disease |
| Physical examination |
| Distribution of hair loss |
| Hair caliber and texture |
| Clinical features of scalp |
| Nail changes |
| Hair-pull test |
| Dermoscopy |
| Scalp biopsy |
| Laboratory testing |
| Complete blood cell count |
| Comprehensive metabolic panel |
| Antithyroid antibody testing |
| Thyroid-stimulating hormone with or without free thyroxine |
| Iron evaluation (serum ferritin, serum iron, total iron-binding capacity) |
| Free and/or total testosterone |
| Dehydroepiandrosterone sulfate |
| Serum prolactin |
| Zinc |
| Hydroxy-25 vitamin D |