is red blood cell count for a women 8 high

my mom born 1939 recently had high pulse issue,,,everything is normal except for here red blood cells which was 8m,,,normal range should be 5m,,,,is this too high and we should pay attention

[aMom21]

It is high, you could search on the internet I found the following

Polycythemia may be caused by several conditions including congenital heart disease, cor pulmonale, dehydration (such as from severe diarrhea), obstructive lung disease, pulmonary fibrosis, or excess RBC production (polycythemia vera).

I would defintely follow up with you Mom's doctor just to east your mind and get the right answers.