hi my son has Beta Thalassemia Major. he had his spleen removed 2 months ago and 4 weeks ago his white blood cells count is high it went up to 36000. his 8 years old. what could be the reason for a high white blood cell?

Usually an elevated white blood cell count indicates an infection somewhere. Other causative factors of elevated white blood cells can be an inflammatory process, allergies, trauma, leukemia....but to really be sure, ask his doctor, he/she will be the only one able to give you proper information regarding your child. Good luck.