The vein that is easiest to hit is the median cubital vein.
The median cubital vein is located in the inside bend of your elbow, "the antecubital fossa" and is the easiest and also most common vein to hit.
The medium cubital vein is also large and relatively close to the surface and highly stable, which makes it the preferred and primary site for drawing of blood as well as for inserting of IVs.
Other common sites and veins that are easiest to hit and are used for venipuncture and intravenous access are the Dorsal venous network, basilic vein and the cephalic vein.
The Dorsal Venous network are the network of veins that are located on the back of your hand.
They are also highly visible and often are used when the larger veins of your arm are not accessible.
However they are generally smaller and more fragile.
The basilic vein is located on the medial or pinky side of the arm.
And although it's a significant vessel, doctors often consider the basilic vein after the median cubital and cephalic veins due to it's proximity to the brachial artery and the medial cutaneous nerve of your forearm.
And the cephalic vein is vein that runs along your lateral (thumb) side of your forearm.
The cephalic vein is a frequent alternative for peripheral venous access.
These procedures in clinical settings are performed by trained professionals, that follow strict aseptic techniques and safety protocols to minimize risk of complications like infection, nerve injury and hematoma.
To make veins easier to hit, improve blood flow and dilate the veins before the procedure.
You can do this by drinking 1–2 glasses of water, applying a warm compress to the site for 5–10 minutes, and letting your arm hang down by your side.
Follow these steps to make veins "pop" and easier to access:
1. Boost Blood Flow and Dilation
Hydrate thoroughly: Drink plenty of water in the hours leading up to your appointment.
Well-hydrated blood vessels are fuller and more prominent.
Apply heat: Warmth causes blood vessels to relax and expand.
Use a warm towel, heating pad, or soak your arm in warm water before sticking.
Use gravity: Let your arm hang downward for 60 to 90 seconds.
Gravity will help blood pool in your lower arm and hands, plumping up the veins.
Light exercise: Do a few light bicep curls, or gently open and close your hand to increase circulation.
Avoid aggressive "pumping" of your fist, as it can skew certain lab results.