Patients with kidney stones can donate blood normally as long as they do not have a combination of elevated body temperature or signs of systemic infection. Kidney stones are not infectious through blood, so they are not a blood-borne disease and can be donated normally without affecting the quality of blood. If the kidney stones are infected, hematoma and elevated white blood cell count may occur, so blood donation is not suitable during the infection. If the kidney stone is not infected and the condition of the stone is stable, you can donate blood normally without any effect. Kidney stones only cause localized lesions in the urinary tract and do not lead to infectious lesions associated with the blood system. The presence of kidney stones can cause urinary tract obstruction, urinary tract infection, and bleeding due to urinary tract rupture, which can also lead to increased pressure in the renal pelvis, resulting in back pain and abdominal pain. The above symptoms can be completely cured by lithotripsy or surgery and will not lead to the transmission of the stone components into the bloodstream, so blood donation is allowed.