I was recently told my white blood cell count was slightly on the low side. I was told 4.0-10.0 is WNL range. My blood test result was 4.1...Not alarmingly low but my doctor wants me to come in and redo the test to see if it has changed at all. One thing I noticed right around the same time I took that blood test, I got a horrible cold sore on my lip. I ve never had one in my life and it lasted about 3 wks before it was totally gone. I still have a red mark under the surface of my lip (2 months later) but the blistering is gone. I m now thinking my immune system was compromised at that time which most likely caused the fever blister. I also have some unexplained foot pain with fluid retention, with gout like symptoms. The doctor did ultra sound and found a significant amount of fluid in them in the area under the big toe. Now a month later I have the same thing on the opposite foot but on the lateral portion of the foot. It feels like a foreign substance is under the skin of my feet. I m going back for a follow up next week. Just curious if you are familiar with this or if it could have something to do with low WBC count???