Why would a doctor use non-dissolvable stitches?

[cloudingova]

My son had a suspicious mole removed as a dermatology outpatient. It only needed 2 stitches, but they were non-dissolvable. He was told to see the GP to get them removed after 10 days. We got him a GP appointment today (after 8 days) because they were itchy. The GP has now told him the wound has scabbed over the stitches so will need to be re-opened in order to remove them. He has been sent to a minor injuries unit to get that done. I expect he will now end up with a more of a scar than expected.

My question is - what clinical reason might there have been to use non-dissolvable stitches in the first place?

They did this with my c section even the doctor at my gp was confused

I've no idea!

I had a mole removed and they used dissolvable ones.

https://londonskinclinic.london/the-advantages-of-non-dissolvable-vs-dissolvable-stitches/
Non-dissolvable stitches are often the superior choice for dermatological surgeries, offering improved scar quality, greater durability in high-tension areas, reduced inflammation, and tailored removal timing. While dissolvable stitches are suitable for specific cases, non-dissolvable options ensure optimal healing and aesthetic outcomes, particularly for visible areas like the face and neck.

Skin grew over my 3yos op wound, magnesium sulphate paste sorted it without needing to reopen it.

My c section stitches were supposedly dissolvable but I pulled a few of them out months later! Very odd feeling.

You can soften the scabs with saline, soak some gauze in it and hold it on the area. It might be enough to remove the scabbing to get access to the sutures.
I've removed hundreds of sutures over the years and I have never seen a wound reopened because of scabs sticking to the sutures. We just soaked them off.

I had dissolvable stitches in mine which didn’t dissolve and scabbed over anyway and had to be removed 🤷🏻‍♀️

high tension/high movement def need permanent thread. dh had an alginate plaster (translucent like a blister plaster) on top of the wound and the thread was kept quite long to avoid it being 'healed in'.