Dissolvable Stitches - How Long?

[Karu'sMama]

I was reading the post below about the dog having the go to the vet for infected stitches and it kinda brought up the question. How long does it take for the inner dissolvable stitches to break down?

My pup was spay and had an umbilical hernia repaired Nov. 11th. I can still very much feel the stitches under her skin. And I've been a bit worried about it, but I read somewhere it could it took take up to 6 months for them to dissolve so I haven't rush to the vet. Whats the average time frame for these to go away and when should I start really worrying?