been suffering badly with mine now for over two years, lifting a cup of tea is very painful, like someone stubbing out a cigarette on my arm.
Have had 20 physio sessions, 3 acupuncture, countless stretching exercises and two steroid injections, power balls elbow cuffs, you name it I have tried it.
Riding my MTB is not as painful as my road bike. Strangely hill walking causes me most pain as gravity wants to straighten my arm which it no longer wants to do. The arm also seizes up over night and takes time in the mornings to get it moving.
Severe tennis elbow is not nice at all.
First injection worked for a couple of months, before the second injection was offered surgery but this would mean no biking/kayaking for 6-8 weeks minimum so went for the second injection and if/when it comes back am going to have the surgery in the winter.