In reply to timmyhobby:
Absolutely do not take a long break! Follow a physios advice if you can afford it. But otherwise - cut back on volume and intensity on your climbing a fair way, avoid tweaky moves and especially dynos and do eccentric weighted wrist exercises.
I had golfer elbow for a long time and tried many approaches (including acupuncture, which did not help) and saw a number of sports physios.
After an extended period of it constantly reoccurring and being unable fo the a few years to do pull ups without it flaring up, and even an extended period of break from climbing (around 6 months, which I now know was not needed and counter productive), I now have it under control and with the exception of an unrelated recent tennis elbow flare up, due to starting compound lifting, I have not been prevented from climbing or training pretty hard well into my 40s without golfers elbow issues.
For me the secret was using standard eccentric loading with a weight on a cut down broom handle (think lattice sell a version which I hear is pretty decent, but really just the same thing). Benefit of the home made one is it's cheaper and you can add as much weight as you want. Happy to send you photos of my set up if you want to understand it better.
Others above have detailed the protocol - but for me I started light (say 2kg), I lifted back to vertical with the other hand at the early stages and only went to both down and up unassisted at later stages.
My main changes that REALLY made the difference was to do three sets (8reps) one with elbow at 90 degrees (i.e. standard), one at full extension i.e. straight arm supported by the arm of a chair and one at full lock. I did read this in an article, but can't remember where!
For an extended period even after initial recovery I did these daily morning and night (takes 5 mins) especially when climbing a lot.
In more recent years I have found I can go months without doing them, but will monitor my elbows and start again if things feel tender.
Trust me - you can sort this! In 6 months it will be some other tweak you will be obsessing over! Probably a finger 🤕