Why is my hair falling out?
Not a diagnosis: a head start. These are the three drivers most worth checking first, based on what the evidence says gets missed most often.
Ferritin is the headline
Hair follicles are iron-hungry. Shedding with low-normal ferritin is the most common fixable cause.
Pattern vs shedding
All-over shedding (often 3 months after stress or illness) differs from pattern thinning. Different paths.
Thyroid and hormones
Both directions of thyroid, and androgens in PCOS, show up in hair first.
Ferritin, TSH, vitamin D; androgens if cycle is irregular
1. Start a two-minute note so the pattern becomes visible.
2. Take the test list above with you so you can explain the pattern clearly.
3. Read the evidence: Hair Loss in Women: What Doctors Miss · Hair Loss in Your 20s and 30s: What's Actually Happening and.
Education, not diagnosis, and never a replacement for your GP or pharmacist. Reference ranges and guidance vary; sudden, severe or worsening symptoms need 111, or 999 in an emergency. By Hussain Sharifi · independent, affiliate-free health research.