Yes. There is definitely a possibility of having complications month's after.
I just recently got clean 5 1/2 months ago from using cocaine and heroin daily for more than 10years,and occasionally I would shoot meth as well.
I'm not saying that I was an expert with using needles,but i never had any issues with having sores or any kind of infection. Until just recently.. I was working out in my basement one night after work like I usually do. The only difference on this night was that I was hitting the body bag,and boxing/sparring with my roommate.I was also doing a light set of bench presses when I noticed that my arm was starting to swell around the inside of my forearm where my arm bends at the elbow. Anyway I had originally thought that maybe I had either hyper extended or pulled a muscle.So soon after that I got 2 ear infections,and started feeling sick. I finally went to the E.R. where they immediately told me that something was seriously wrong with my arm, and told me they needed to do blood work,ultrasound, CT scan etc.. To wrap this up. I had a blood clot in my arm, that was infected. I had to have an emergency surgery.The doctor/specialist told me that even though I was no longer actively using.The blood clot came from damage done to my veins from years of using needles, and the amount of scar tissue along with circulation issues,and some other factors. He also told me that there's a possibility that the clot had been there for a while. Anyway if I hadn't of came in when I did, there's a good chance that the clot could of moved along with the infection and I would have probably died as a result. I appologise for the long post, I just felt it was necessary to share and inform you and others,that using needles is just as deadly as the drugs.I also learned that you never know when your past might catch up with you, and it can be fatal;and that's it. Here one moment, doing the right thing in recovery and living right,and in the next moment your gone. I was in the army and completed 2 tours in Iraq, and none if that compares to thinking that even though im living right now.. it can all be over at anytime, no do-overs. I do feel like I've been given a second chance,and crazy shit like this should open our eyes. Our time on this planet is short..why would you want to put that at risk! Its not worth it! So anyway, I hope that me sharing my experience with having to re-live my past, it can be avoided for someone else.