I have one right now from an iv. Like lynnwood says, if it doesn't go away, you should have it looked at. It should get better with the treatment she suggested. There are some nasty infections around so if it seems hot or weeps liquid, gets real red or anything abnormal I would make sure to get it checked out in urgent care. I know I just don't heal up as fast as I used to, but this can put you at risk for infection too. I used to draw blood and haven't seen one as large as you describe personally, but have seen and had some ugly ones! Hope it gets better quick.
Ills--Sjogrens-Lupus cond., AI polygland. dysfunction 2, hyper/hypopigment, scoliosis,kyphosis,stenosis, deg.,O.A.,spine surgeries, salivary/lymphectomies, NASH, COPD, RLS, UT/GI bleeds, hystero, brain/nerve damage,TB
Meds--INH,Plaquenil, Evoxac, Metformin, Synthroid, HCTZ, HRT and Lidocaine patchs, Voltaren gel, Klonopin, Vicodin, Restasis, Albuterol, steroids