Has anyone ever dealt with anything of the likes of tennis elbow? The past few months I've been noticing soreness around my tendon area from stupidly doing heavy triceps extensions (with good form though 10-12 reps), my triceps have grown like crazy but my joints have just been suffering. The soreness used to just happen on my left arm but today my right arm just started getting real sore especially after having to lift heavy things at work. I've been supplementing with joint supplements like gelatin lately among other things, has anyone has any personal experience with this? I'd rather not take time off and lose my hard earned mass. Any serious help from people WHO ACTUALLY TRAIN would be appreciated. 
I actually posted about this in another thread just a few weeks ago. That was the exact exercise that caused the pain, too.
I tried to carry on with regular workouts for a while (I'm talking in the area of 6 months), I adjusted the weight, worked only until I started to feel pain in my elbow. This was an awful move for me. I was really stubborn because I didn't want to lose any gains, but it ended up making the pain so bad that it started affecting my sleep. However, I did eventually get rid of the pain without medical intervention and these are the things that helped me out.
1) Invest in a pair of elbow wraps. I didn't do this until the pain was at it's worst and they allowed me to lift heavy without pain. I feel like I would have saved myself a lot of aggravation had I purchased them earlier on.
2) STOP WEIGHT TRAINING. As I said, I was stubborn and did not want to lose any gains, so I powered through exacerbating the problem. However, as a result of having to take a forced hiatus from the gym, I ended up replacing weight training with an hour of intense upper body cardio. I didn't make any gains and my chest is usually rock hard and my wife noticed that it wasn't as hard, but I didn't lose as much as I was worried about. When I got back to the gym, I still was able to do 15 solid bodyweight dips and 8 clean bps with 285. It wasn't planned, but the most important thing was that the pain was gone.
Honestly, I know the temptation is to see how much you can power through before the pain subsides, but I would strongly suggest stepping back from the gym and trying intense upper body cardio.