Golfers elbow, or tendinitis of the Palmar flexor muscles in the underarm, is a long term diagnosis, and basically extending your elbow, supinating your underarm whilst Palmar flexing your wrist at the same time in a concentric movement, almost at any strain, will be painful.
What I've found to work is heat/20 min, cold 20/min nothing 20/min. This makes the tissue regenerate quicker.
Ultrasound always works with tendinitis, but you need someone to do it for you.
Laser treatment can also speeden up the process.
Kinesiotape can remodel the neurorespons in the elbow, hence helping you, and it also does a bit of myofascial release in the area, which usually helps the pain.
It takes time, the exercises are boring, but you need to work hard on the eccentric failure training, to undo the tendons so they can heal properly.
Hope this helps your mindset.