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.
Cold intolerance is one of its most specific signals.
Low iron means less oxygen delivery; hands and feet pay first.
Fingers turning white then blue then red is its own named, manageable thing.
TSH, ferritin, full blood count
1. Start a two-minute note in the free journal that asks back, so the pattern becomes visible.
2. Take the test list above to your GP; the GP Script Generator will help you say it clearly.
3. Read the evidence: Always Cold Hands and Feet? Your Body Is Trying to Tell You Something.
Want it tracked and reviewed monthly by a real person? The Club, £10/month.
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 intelligence.