All 2st Seat cover going up at seams.

Hi all.
I have a small problem, and im wondering if i can fix it before it getts big.
The seam on the one side on the seatcover is starting to give in, its not much at the moment.
So im wondering, is there a way to fix the seam before it getts to the point that it looks nasty and i have to buy a new seatcover.
Its maybe 1-2cm small gab on the side, so its not bad at the moment. But i know it will gett worse and worse if i dont do anything about it.

Tnx for help.

Release the cover from the back/bottom side and hand sew it before it gets worse, if you can get to it. I am a former western saddle maker and have industrial sewing machines for both upholstery and a heavy leather stitching unit. You don't want to have to pay to get a new one made, or have it machine sewn then that's what I would do. Try to reuse the old machine sewn holes and not poke new ones. A piece of similar size nylon thread of the same color if possible and use a needle on each end of the length of thread and go back in forth through the holes similar to lacing a pair of shoes but running the thread each way through each hole. Simplest way.

Ok. tnx.

You are very welcome.