Scab 4 weeks after stitches removed.
Doctor Answers 1
Scab after stitches
On the back what probably happened is that that there was a bit of tearing after the stitches were removed and it created a bit of blood that scabbed over. You should remove the scab and not leave it there, as it will cause a worse scar. Actually, you should have been doing this part all along. Scabs=scars so you need to keep the site clean and remove any crusty blood and keep it gooped up with Vaseline or Polysporin. This allows new pink skin to form flatly and minimize scarring.
"This answer has been solicited without seeing this patient and cannot be held as true medical advice, but only opinion. Seek in-person treatment with a trained medical professional for appropriate care."