You likely did not undo the effects of the IPL treatment, but what you are describing sounds unusual for IPL - massive swelling and horrible bruising. I agree with other responses here too that you should not be taking random doses of prednisone that is lying around. The reaction on...
Although it’s rare, a herpetic outbreak can happen after laser treatment and it can be treated with oral medication. If this is just a superficial skin reaction, sometimes topical hydrocortisone can be applied. It is difficult to tell from the photograph. I would go back and check with the doctor.
Thank you for your question. The darkening of the spots or the "coffee ground" appearance may or may not appear depending on the settings, depth of pigment, and amount of pigment remaining. I would still recommend continuing your treatments as long there is improvement. I would also recommend...