How does a chest cold or respiratory infection impact blood test results?


Q: Hello Doctor. I recently went to my doctor for my annual physical and at the time of my visit I had a very bad cold and chest congestion. A crackling noise in my chest with a lot of mucus. I was and still am using my asthma puffers due to the shortness of breath I experience at times. It has been 1 week and my congestion seems to be getting better. During the physical my Doctor had me do routine blood tests. The blood test results showed a higher than normal red blood cell count. The doctor told me to re do the test when I was over my cold as this could have impacted the results. Does this all make sense? Is it normal to have an increased red blood cell count during a chest and lung infection orcold? What else could of been impacted in the blood test results as a result of me being sick?


A:   This question is currently in queue and will be answered shortly by one of our doctors. In the meantime you may browse our library of answered questions by clicking here.

Related Q&A

Q: I'm on my second cold in a month. Very plugged nose especially in bed - lots of blowing & coughing - sometimes a...

Q: My 3 year old boy has been unwell for around 7 days, flue like symptoms runny nose now has a slight cough but yesterd...

Q: Saturday evening Sept. 3rd. I came down with what I thought was some kind of flu. My daughter and grandkids had been...

Q: I have been having for about 2 weeks a sore neck, a low grade fever and the skin on my feet feel tight. Do I have ...

Q: I have had fevers, muscle aches, regular toilet stops, fatigue, loss of appetite, wheezing, consistent coughing which...


Dr. James Obaji M.D.

  • 247 Reviews
  • Family Physician

Dr. Suneel Sharman M.D.

  • 190 Reviews
  • Family Physician

Dr. Pat Golden M.D.

  • 169 Reviews
  • Cardiologist

Dr. Kunaal Jindal M.D.

  • 112 Reviews
  • Plastic Surgeon