Sickle cell anemia - Symptoms & causes - Mayo Clinic
https://www.mayoclinic.org/diseases-conditions/sickle-cell-anemia/symptoms-causes/syc-20355876
WEBDec 22, 2022 · Episodes of pain. Periodic episodes of extreme pain, called pain crises, are a major symptom of sickle cell anemia. Pain develops when sickle-shaped red blood cells block blood flow through tiny blood vessels to the chest, abdomen and joints. The pain varies in intensity and can last for a few hours to a few days.
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