The stitching has come out and the seam has pulled apart most likely due to a combination of an insufficient width of seam allowance and a stitch length too long for the loose weave of the fabric. When the garment is on the body, the motion of wearing the jeans causes strain against the seam and pulls on it.
If the seam was originally a flat-felled seam, which is very common on jean legs, 'repairing' it is very time consuming. The entire seam will need to be taken apart, pieces sewn, and a new flat-felled seam reformed to integrate with the rest of the seam. This type of repair does require a certain amount of sewing skill and familiarity working with denim.
If the seam was originally a basic seam, repairing it does not require as many steps, although it will still need to be reinforced by adding on, to prevent the new seam from coming apart the same way when the garment is worn again.
Using a small tool called a Jean-a-ma-Jig, or Hump-Jumper (different brands have different names for basically the same tool) is recommended when sewing thick denim or canvas. To facilitate sewing and avoid breakage, use a quality name brand Denim or Jeans sewing machine needle.
I have a plastic chair mat under my computer desk that the edges are curled and won't lay flat. Have been unable to bend them back as the plastic is hard
Hi Kimberly, this video will show you how - https://www.youtube.com/watch?v=5xSi_z2xG8M
https://www.wikihow.com/Mend-a-Torn-Seam
https://lifehacker.com/five-basic-hand-stitches-you-should-know-for-repairing-1723233194
The stitching has come out and the seam has pulled apart most likely due to a combination of an insufficient width of seam allowance and a stitch length too long for the loose weave of the fabric. When the garment is on the body, the motion of wearing the jeans causes strain against the seam and pulls on it.
If the seam was originally a flat-felled seam, which is very common on jean legs, 'repairing' it is very time consuming. The entire seam will need to be taken apart, pieces sewn, and a new flat-felled seam reformed to integrate with the rest of the seam. This type of repair does require a certain amount of sewing skill and familiarity working with denim.
If the seam was originally a basic seam, repairing it does not require as many steps, although it will still need to be reinforced by adding on, to prevent the new seam from coming apart the same way when the garment is worn again.
https://www.youtube.com/watch?v=BgRiVzT8wM8
Using a small tool called a Jean-a-ma-Jig, or Hump-Jumper (different brands have different names for basically the same tool) is recommended when sewing thick denim or canvas. To facilitate sewing and avoid breakage, use a quality name brand Denim or Jeans sewing machine needle.