Reasons for low white blood count?

[Hyperfish101]

Took DD to docs as she was complaining of dizziness. Did blood tests and all normal except slightly low wbc. Says probably not significant and will repeat in 6 weeks.

However me and my health anxiety are freaking out a bit as she also has had a pea sized, palpable lymph node on her neck. Has had this for ages, over a year. Hadn’t grown and sometimes not there. Seen by GP who suggested it was nothing, common and probably related to her eczema.

However, now putting 2 and 2 together and making 5.

Why would a child (she’s 14) have a low WBC?

www.webmd.com/cancer/white-blood-cell-count-low

Scroll down to causes and you’ll see it’s not just cancers but sometimes things like viral infection or poor nutrition that can cause low white blood count.

Thanks.