Yes, a tooth infection can most definitely cause an elevation in both ESR and CRP levels. As far as the blood pressure, infection alone does not usually raise blood pressure. Pain, however, can most definitely raise the blood pressure.
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Thanks and good luck!
-Dr. Scott W, MD
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No correlation between CRP causing an elevated blood pressure. However, CRP may be raised IN RESPONSE TO elevated blood pressure, but this would be a completely separate issue from your tooth.
For the next question, if you have an tooth that has created a fistula from recurrent infections, it sounds like you do not have any choice but to have it out! They can do great things with dentures and bridges these days, much better than a rotting molar!