Corticosteroid injections are a medical treatment used to reduce inflammation and relieve pain in various conditions, such as arthritis, tendonitis, and bursitis. These injections deliver a synthetic version of corticosteroids, which are hormones produced by the adrenal glands. The medication is injected directly into the affected area, providing localized relief. The effects of corticosteroid injections can vary, with some patients experiencing significant pain relief for weeks or months. However, they are not a cure and may be used alongside other treatments, such as physical therapy or oral medications. It's important to discuss potential side effects and the number of injections with a healthcare provider.