3yr old gets cold sores once a month.low wbc@4.7x1000mcl,neutrophils 38.5%/1.80x1000mcl,lymphocytes 50.1%/2.35x1000mcl.other blood work ok.whats wrong

? cyclic neutropenia: CN is an inherited condition with variable effect on patients where the neutrophils drop from their average normal range to lower levels on a pattern, usually 3 wks or so. Symptoms like mouth ulcers/sore throat are common. Intensity of symptoms/seriousness depends on how low the neutrophils go. The cited numbers are not low. The diagnosis is made after serial testing.