I have just had a well being blood test and was found to have high red blood cell count. I received a phone call from receptionist with message from doctor. Nothing to worry about you have high red blood cell count and you need to repeat the blood test in 6 months time. Is this normal to wait 6 months to check them again? I don't smoke or drink. I am a little overweight. I am 47 years old and not taking any medication. Been looking what causes high red cell count and realise I could simply have been dehydrated, however there are other causes and the worst one could be kidney tumour so why do I have to wait 6 months for further checks? I have been feeling tired and blamed it on my busy life. For years I have bruised easily so do have some symptoms but these could easily be related to other things. If I was dehydrated another test in a week might reveal this and issue over. Did anyone else have a prolonged diagnosis?