A tendency to bruise or bleed easily, including bleeding from the gums or nose, or blood in the stool or urine.
Susceptibility to infections such as sore throat or bronchial pneumonia, which may be accompanied by headache, low-grade fever, mouth sores, or skin rash.
Swollen lymph nodes, typically in the neck, armpits, or groin.
Loss of appetite and weight.
Discomfort under the left lower ribs (caused by a swollen spleen).
Very high white blood cell counts may result in visual problems due to retinal hemorrhage, ringing of the ears (tinnitus), mental status changes, prolonged erection (priapism), and stroke.