2nd IPL makes brown spots more "noticeable" but no flaking. What can I do to fix this?

Thank you for your question jamming_13. I understand your concern.
IPL is a great treatment for facial rejuvenation. If pigment is deep in the skin it will not necessarily flake off and product a coffee ground appearance. But sometimes the pigment can be brought up closer to the surface and appear darker. For my patients I recommend a series of 6 monthly treatments followed by one maintenance treatment every 3 months thereafter. If the pigment is deep fractional laser treatment can be combined with it. Please consult with a doctor for specific recommendations. Good luck!

IPL is not a laser - it is Intensed Pulsed Light - and not recommended for every skin type.  If you wish to post before and after photos it can be more helpful.  IPL  can sometimes make things worse and hyperpigment.  While IPL can be a very effective procedure, not everyone is a candidate.  Please consult an expert in IPL for the best cosmetic results.  Best, Dr. Green

IPL will make your dark spots darker for up to several days before they flake off and disappear. You didn't mention the timing of your IPL treatment, so it is difficult to answer whether the darker spots you have will go away.  If your dark areas are from melasma, they may worsen with IPL.  We certainly have seen IPL on body parts other than the face take longer to fade, and they often don't flake off.   It's best to see a qualified physician (dermatologist or experienced aesthetic physician who does IPL) if its been more than a few weeks since your treatment.