I am scheduled for a series of blood tests for tomorrow.  They always have a hard time finding a good vein to place the needle in.  A friend of mine who has a similar problem was told by her doctor to drink as much water as possible leading right up to the time of the blood test.  Will this alter the results or will they still get a good reading on the blood tests.
Welcome to Chat Doctor. I am Chat Doctor. I had gone through your question and understand your concerns. Do not worry because