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is just an indicator of some inflammation or infection in our body.So , a high ESR denotes one of these two processess.
Do you have any joint pains? If so , it could be problem with your joints causing this.
Do you have long standing cough
or low back pain
, it could be due to Tuberculous infection.
These are the two most common condition , but ESR alone doesnt confirm these diagnosis.
I advise you to visit your Physician and get evaluated completely or just post us few more details , we will help you out.