83% of patients will be better at 1 year without intervention with 40% having minor discomfort at 5 years [8,9]. Poor prognostic indictors include compensation claims, manual work and high initial pain levels. 
Physiotherapy / orthoses
Patients must remove the exacerbating factors that overload the tendon. If rest improves the pain then a programme of eccentric exercises and graduated loading can be effective.  Tennis Elbow clasps are known to work by offloading the degenerate tendon area and are more effective in reducing pain and improving pain free grip strength than watchful waiting, showing significant benefits by 12 weeks. 
Steroid injections provide good initial relief, which peaks at 6 weeks. Recurrence of pain after the initial relief is common. Steroid injections are worse than physiotherapy or watchful waiting at 1 year.  They can also cause sub-cutaneous fatty atrophy at the injection site and patients need to be warned of this.
Platelet Rich Plasma Injections
More than 75% of patients improve their VAS at one year and this is significantly better than corticosteroid injections.  Currently it is not clear if this option is better than good quality conservative management or surgery.