Frequently, there are 2 components to the injection. One is a short acting local anesthetic will provide relief for one or more hours (depending on how long-acting an anesthetic they use. The second part of the injection is often a steriod that might not kick in for a day or two, then will only help if your problem is related to an inflammatory response that is reached and reduced by the steriod.
Good luck! Let us know what the doctor says. Ask her what types of injectant they used.
Mark
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