^ True. Mr.scagnattie, that looks like an arterial map to me too although veins follow a broadly similar pattern.. Vein maps can be of help definitely but as a guide for where to look. Make sure you know how to differentiate an artery from a vein OP (veins have no pulse where as arteries do; other signs are less concrete - arterial flow has more force behind it altho if you are only partially in you may not notice this, arterial blood is sometimes brighter but not always, arterial injection often hurts more but again not always).
Rotating your sites is v important
as is using a fresh sterile needle each time - blunt needles will make it much harder to register and can do a lot of damage to your veins and skin. Try using a tourniquet and bathing your arms in warm water, or lifting weights before you try to register. Wrist can be dodgy if you don't know what you are doing - there are a lot of structures (arteries, nerves etc) in a small space - so ideally have someone show you if you need to try there.. as mr.scagnattie said, start at crooks then move down forearms. Anywhere other than arms is less safe; feet have a high incidence of infection and blood clots, femoral vein is right next to the main artery supplying your leg along with the main nerve supply, and also has a high chance of getting infected and causing serious complications.
Please please don't IM - it's actually riskier than IVing, as any bacteria sit in one place rather than being swept away and dealth with by the blood. It's highly likely you will end up with an abscess.. make sure you are micron filtering and as sterile as possible if you continue, but really you should switch to plugging if you can't IV..
I'm going to move this to Other Drugs as they are the IV experts
take a look at the IV complications megathread in their directory too.
BDD > OD