Steroid injections (kenalog) for nasal tip swelling - how long to work and how effective?

My dr gave me a steroid injection yesterday following rhinoplasty 7 weeks as my nasal tip has lot of swelling. How long does it take to work and how effective? He said swelling will go down in total by 20% in 6 months and the tip which is piggy is 110 fegrees and will go down to 105 degrees. Hate my nose tip at the moment and desperate for this to help.

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