Bump on my upper eyelid after cortisone injection. Will this go away or should I do some kind of plastic surgery? (Photo)

This will probably dissipate on it's own, but it may take many months. If it really bothers you and you don't want to wait, schedule a consultation with a  board certified plastic surgeon about having the bump excised.My best,
Dr. Sheila Nazarian
@drsheilanazarian on Instagram

You can see a plastic surgeon in consultation to determine if a small excision of this residual scar or excess skin is necessary.  It should be a straightforward procedure in the office if necessary.

You are seeing the residual steroid in the lid.  The skin here is very thin, and the steroid we usually inject, kenalog is white.  If injected superficially you can sometimes see the actual steroid under the skin.  This can take many months to go away.  If it doesn't you can have it removed with a small excision.