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A 52-year-old male asked:

i read that wbc is lower in the morning. is this true?

2 doctor answers2 doctors weighed in
Dr. Nadine Yamusah
Specializes in Internal Medicine
Yes. There was: a study published I believe in 1994 showing the concentration of peripheral cells during a woman's 28 day menstrual cycle. It revealved that the WBC are lowest at around 0600 and and reached its peak at 5 pm.
Dr. Jason Sample
General Surgery 24 years experience
Great question. Yes!: We have been interested in leukocyte count variation for a century or so. Leukocyte counts in humans are known to vary as much as 100% during the day. That is to say, a healthy man with a WBC count of 4000 at one point in the day may have a WBC count twice that later in the day. The WBC count usually nadirs in the early morning (0000-0200) and again in late morning (0900-1100).

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Similar questions

A 28-year-old member asked:

My WBC was low twice and the 3rd time it was normal. Should I have another draw to be safe?

2 doctor answers3 doctors weighed in
Dr. Claude Parola
Internal Medicine 40 years experience
Depends: Sometimes a viral infection can cause your WBC to go low and once you get over the infection , the WBC goes back up to normal, but other diseases may cause low wbc, such as : hiv, myelodysplasia etc... ( abnormal bone marrow functioning). If your WBC was slightly low and then become normal, i would not worry much, but if it was very low and become bearly normal, repeating it is not a bad idea.
DE
A 24-year-old member asked:

What is WBC automated? And what's the normal range?

2 doctor answers3 doctors weighed in
Dr. Edward Neilsen
Family Medicine 19 years experience
Depends: This depends on the exact machine specifications, but usually the nomal range is somewhere around 3-10.
DE
A 24-year-old member asked:

Wbc automated reads 3.4, is that normal?

2 doctor answers5 doctors weighed in
Dr. Michael Mirochna
Family Medicine 13 years experience
Don't worry: A WBC count of 3.4 would be considered low, but it's not worrisome. This happens commonly. Repeating the test in a few weeks to months can show that it returns to the normal range. If it was zero, that would be worrisome. I would especially not worry if you are feeling well and this was checked as a screen or a problem such as high blood pressure.
A 45-year-old member asked:

No other symptoms, fatigue, headaches, and WBC from 11k to 30k up, down, up again ?

2 doctor answers2 doctors weighed in
Dr. Nela Cordero
Pediatrics 54 years experience
Infection: Increase in WBC means infection specially with accompanying symptoms consult a doctor thanks.
A 41-year-old member asked:

I have a high WBC for unknown reasons. I'm not sick, so is it still a bad thing?

1 doctor answer2 doctors weighed in
Dr. Kelty Baker
Hematology 28 years experience
High white cells: High white cell counts can be due to a variety of things such as infection, inflammation, medications, smoking, obesity, and blood disorders such as leukemia or a myeloproliferative disorder. Sometimes people are born with a high white cell count, having inherited it from one of their parents. This abnormality must always be evaluated by a hematologist so that serious problems can be ruled out.

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Last updated Sep 28, 2016
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