This 15-year-old African American female presented with bilateral thigh and hip pain that was worsening over one day. Her symptoms were consistent with a sickle cell disease pain crisis and a urinary tract infection. Sickle cell disease is caused by a single amino acid substitution that causes hemoglobin to polymerize and distort red blood cells into a sickle shape under low oxygen conditions, leading to vaso-occlusive crises and tissue damage. Treatment involves pain medications, fluids, antibiotics, transfusions, and potentially stem cell transplant.