Amazing. My left elbow, affected by lateral epicondylitis has had a significant degree of reduced pain movement returned simply by having a hot shower. I’d noticed rather tense muscles in the forearm nearest the elbow, they’ve relaxed somewhat under the hot water.
Which is NOT to sat it isn’t horribly sore, though. It’s a dull ache until I exceed the current arc of movement at which point nasty words are uttered.
An exercise to relieve the problem involves stretching the extender tendon between the wrist & elbow by gripping a ball and gently flexing the wrist forward.
I experienced significantly less pain today whilst performing that action.