young female with pain in her elbow (lateral epichondylitis) best treatment is.. corticosteroid injection

young female with pain in her elbow (lateral epichondylitis) best treatment is:
• Treatment of lateral epichondylitis:
1) 1st line : NSAID + rest + ice
2) 2nd line : corticosteroid injection
3) 3rd line : surgery + percutaneous release of common tendon.