I had a blood test done 2weeks ago.2 days after i have/still have pain when stretch arm.dont have good vains.took 2 trys only bit swollen/sore?

Traumatic phlebitis: It is not uncommon for the vein to be inflamed after being punctured for a blood draw. It can take 3-4 weeks to resolve. If the area gets warmer or redder or more painful or you get a fever, it may have become infected and you need to see a doctor. In the meantime, anti-inflammatory creams like Voltaren (diclofenac) gel might help it improve faster.