Is a cortisone injection harmful?

Asked: Is a cortisone injection harmful?My left wrist has been in pain for over a month now. Last week, I went to my local GP and they suggested an ultrasound. The results from the ultrasound said that my left wrist has wrist tendonitis (tenosynovitis). My GP has recommended that I book an appointment for a cortisone injection to treat the pain. I have done some research and read a few forums online, many of which have people who have said that even just one cortisone injection gave them long term side effects such as weight gain and acne. According to various websites, these long term side

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