This is my first post so I apologize if it's at the wrong spot. Ok so.. I have been using the same area on my arm for a while cause I can't seem to hit on my left arm. Just today it started to get really sore and I can't fully extend or bend it because it hurts so bad. I'm assuming that my arm is just sore and needs to heal, but I just wanna make sure I don't have any serious problems. I'm obviously gonna have to give this spot a break for a while now so it can heal, but like I said I haven't been able to use my left arm lately and I've never tried anywhere else. My veins aren't really visible, except for the ones in my hands and wrists. I have checked out vein maps but I'm still not really sure if any place is too dangerous to try. Any help would be appreciated.
Here's a pic of my right arm..