Hi, I've Just Had Some Dissolvable Stitches Put On A

hi, i've just had some dissolvable stitches put on a really deep cut on my hand, the practitioner nurse said if it feels hot, sweaty and irritable then to come back and it might be infected so i might have to be put on antibiotics. i had a look this morning and took the plaster off and the stitches have came off and the stitches have gone yellow?