How can one treat keloid scars that recur after steroid injections?

That really depends on what sort of lasers/skin treatments you are doing. Ablative lasers, deep chemical peels or skin devices like fractional RF breach the skin layer and pose a risk for keloid formation. This is why I personally have both ablative and non-ablative fractional lasers for scar/rejuvenation/wrinkle treatments. If you are only using non-ablative lasers or laser toning, there is negligible risk. In fact, some non-ablative lasers like the pulsed-dye or long pulsed ND:Yag lasers can be useful for treating keloids!

Thank you for posting a question. This is a complex question, which warrants proper questioning and examination by a qualified doctor. Any answer we give here will be difficult to answer your question with proper justice. Depending on your weight, 20mg of prednisolone is usually considered low dose and it is usually not expected to have these side effects especially when the course is so short as well. (perhaps you can consider to see a doctor to check if you have other medical problems) Most of your symptoms are non specific, and as such answers will probably be non specific as well.