Blood tests for pale skin
| Test | Normal Range | Why ordered |
|---|---|---|
| Haemoglobin (Hb) | Men: 13.5–17.5 g/dL; Women: 12.0–15.5 g/dL | Anaemia — the most common cause of pallor |
| MCV (red cell size) | 80–100 fL | Low = iron deficiency; high = B12/folate deficiency |
| Ferritin | 20–200 ng/mL | Iron stores — even low-normal causes pallor |
| B12 / Folate | B12: 200–900 pg/mL | Macrocytic anaemia with pallor and fatigue |
| TSH | 0.4–4.0 mIU/L | Hypothyroidism causes pallor and fatigue |
| Reticulocyte count | 0.5–2.5% | Bone marrow response to anaemia |
What causes pale skin?
Iron deficiency anaemia — most common
Iron deficiency reduces haemoglobin production, causing the classic pale, tired, breathless picture. Pallor is most visible in the conjunctivae (inner lower eyelid), palms, and nail beds rather than general skin colour. Ferritin is the most sensitive marker — levels below 20 ng/mL indicate depleted iron stores. Causes include heavy menstrual periods, dietary deficiency, pregnancy, or GI blood loss.
Emergency signs with pale skin
Seek immediate medical care if pale skin is accompanied by: sudden onset with chest pain or shortness of breath (acute blood loss or heart attack); blue-tinged lips or fingertips (cyanosis — oxygen emergency); cold, clammy pale skin with rapid heartbeat (shock); or pallor with bruising and bleeding (severe bone marrow failure).
Questions to ask your doctor
- Is my pallor from anaemia, and what type?
- What is my ferritin — do I need iron supplements?
- Should I be investigated for a source of blood loss?
- Could my thyroid be causing fatigue and pallor?
Medical Disclaimer: For educational purposes only. Always consult a qualified healthcare professional for diagnosis and treatment.