Had scratches on my arm by my cat. today washed dishes for pt (i'm a cna) & noticed that my scratches have a bump under them. what is? mrsa? scared!

Cat Scratch Disease: I highly doubt this is MRSA- instead it's probably Cat Scratch Disease. Usually this is a self-limited problem that goes away in a week or so, BUT if you have fever, swollen lymph nodes, worsening rash, or other major symptoms then see a doc right away. Since you're a keloid former -I would also recommend to reduce any chances for skin damage, as more keloids could form. Maybe get cat declawed??