I just got my 4th fill today. 5 months post op. Usually I have no soreness, bruising or anything but today at the injection site it twinges and I have a dime size bruise. Is this normal? All I have read on here are how painless, easy these fill visits are so im just wondering.

I wouldn't be worried. Sometimes different docs, nurses etc have better techniques than others when finding and manipulating the port with both their hands and the needle. Sometimes they just overmanipulate the tissue, or give a lidocaine injection too quickly etc. Call the doc if you see the bruise swell, spread or become fluid filled.