How often cortisone injections are given varies based on the reason for the injection. This is determined on a case-by-case basis by the health care practitioner. If a single cortisone injection is curative, then further injections are unnecessary. Sometimes, a series of injections might be necessary; for example, cortisone injections for a trigger finger may be given every three weeks, to a maximum of three times in one affected finger. In other instances, such as knee osteoarthritis, a second cortisone injection may be given approximately three months after the first injection, but the injections are not generally continued on a regular basis.
While applying Phenylephrine will constrict the blood vessels in the bags under your eyes, it isn’t the only issue causing those bags. Usually there’s quite a bit of extra fluid (aka-swelling) in the small fat pad there. So, it’s only a partial solution. Long term use of the Phenylephrine can up-regulate the opposing beta receptors, making the Phenylephrine less effective. As well, if you suddenly stop using it you can actually see a rebound swelling. This is often seen when people overuse nasal decongestants for longer than is recommended.