nothing is wrong. we both know that you have plenty of blood. it is just a problem trying to get it out. the skill of the phlebotomist may be in question. using a smaller "butterfly" needle may have solved the problem. some veins are smaller and more elusive so going to a larger vein in the arm should have been easy if your arm is not too large. veins are typically palpated (felt) rather than viewed when it comes to drawing blood. if the tourniquet was not on tight enough or long enough the vein may not have distended. if all fails many phelbotomists will put a warm compress on your arm and allow it to dangle down a bit.
i treid to get blood drawn and nothing came out from my arm so they tried my hand and still nothing whats wrong? . i am a healthy 20 year old female. the doctor tried the veins in my arms first and nothing came out so he then went to my hand and nothing came out he said my veins were to small. i had drank a whole bottle of water an hour before i went in because i had to do a urine test right after this.