Not all injections are harmful to tissues. Injections of corticosteroids are generally safe and do not typically cause damage to the structures being treated if administered correctly. It is recommended to space out the injections over several months to minimize any potential risks. It is important to weigh the benefits of the treatment against the risks, and regular monitoring of your condition can help you make informed decisions about your health. Keep in mind that no treatment is intended to be lifelong, as your health may change over time.