While there is little to no downtime with injectables, if you do not want anyone to have any idea, you may want to schedule your appointment late in the day or on a Friday. While post injection bruising is very rare, you will have a bit of swelling. This shouldn’t be noticeable to anyone who isn’t looking for it. But you may also have a bit of redness at the injection sites. This typically resolves in 24-48 hours so really, it’s up to you whether or not you return to work immediately.