I've had more elbow/ shoulder/ back issues than you can shake a stick at over the years. One thing I do know is not to try to blast through it! Whatever aggravates it, no matter how much you love the exercise, stop doing it and do something else. It can be as simple as changing the angle, going from DB to Cable for example but change something.
I would rate my tri's as arguably my best bodypart for size and development. Despite being in my mid-40's now and training 6 times a week, I haven't had elbow pain for a while now and I would put it down to several factors;
- WARM-UP! - I warm-up them up properly every single workout, that's a minimum of 50 reps with just a bar to get blood flowing to the area, 12 reps at 50% and 6-8 reps at 75% then probably 1-2 at 90% (of working weight) and it's a slow negative and really get a feel for the muscle working. I'm pumped by the time I start a working set.
- MIND TO MUSCLE - Once you get this it's easier to keep constant tension in the muscle, never lock your arms out
- VARIETY - Ensure your exercise selection hits all 3 heads of the tricep and vary the intensity/sets/reps. Build upto 6 rep max, then change it up. Don't be scared of even 100 rep sets - they all have their place. Assess how many pushing exercises you are doing!
- DIET - Sort it out and eat properly and I mean at least 12 servings of veg/fruit a day to help fight inflamation in your body (consider supplementing with turmeric and krill oil, they really work!)
I can't stress the diet enough, it's easy to think you're getting away with it but your body will suffer long term with inflammation and other issues long run. Also a typical bodybuilding diet of tons of meat, dairy, high carb sources like oats, flour, rice, bread, sugar, sweeteners then protein powders and supplements on top are just terrible for this. You need to balance it out if you want to hit your goals long term and train pain free. Since I made this change to my diet around 3 years ago the difference is night and day. Even on a bad day I'll have 10 servings fruit/veg but upto 20 with smoothies and juices.