Are you sure you don't have pickanick basket elbow?
Now, I have some useful advice (based on personal experience):
If you really have outer epicondylitis (tennis elbow), you need
to do some things:
- Get a special strap to wear as shown in the link below. It should be adjustable, & not elastic.
- Give that arm a rest. Do nothing which aggravates the pain.
- Avoid gripping anything with that hand to grasp anything with a very open hand.
It will take a good month or so to heal.
Epicondylitis: the outer elbow injury | Formedica