Are there any procedures that could improve or remove old scar tissue from a bad breast reduction?

Hello and thank you for your question.  This question is a little difficult to answer without photographs of the scars or an in-person physical exam.  Overall, scar revision can definitely be done.  This may entail cutting out the old scar and revising the "folds."  There are also other possible treatments depending on how bad the scaring is.  These treatments include lasers, microneedling, and PRP amongst other things.  The best thing to do at this point is set up a consultation with a board certified plastic surgeon.  The surgeon will be able to guide you through the best possible options for.  I hope this helps.  

so schedule a visit with a local plastic surgeon to see what can be done for you.  I'm positive the major issues you have can be improved considerably with a revision that can often be done in the office under local alone.