When a hole grows by itself

Sep 20, 2026

Short answer: In knitwear a hole keeps running with every movement, because the stitches hang on each other. In woven fabric the hole stays put and only frays at the edge. That is why knitwear needs quick action, ideally the same day you spot the hole.

Knits run, wovens fray

An open stitch in knitwear pulls the next one with it each time the fabric stretches. It is the same mechanism that makes a ladder run in tights. Woven fabric is made of crossing threads, so there only the edge slowly frays. This applies to all knits, including bamboo socks for women.

The pace depends on thickness

In thin knits a hole can run several centimetres in a week, in thick knits far more slowly. Thin threads have less friction between stitches and slip more easily. Thicker knits hold together better, but the hole still grows if stretched again and again. It shows most on soft, stretchy pieces like bamboo joggers for women.

Where the hole sits matters

A hole in a spot that stretches a lot grows faster than one somewhere quiet. Knees, elbows, heels and the waistband area stretch with every move. A hole at the shoulder or lower back may stay the same for longer. But every hole in knitwear grows sooner or later, so do not wait too long.

Stop it the same day

A few stitches from the inside take two minutes and stop the hole growing. Gather the open stitches with needle and thread and sew them to the intact fabric around them. You do not need a neat darn straight away; the point is to lock the stitches. This goes for bamboo underwear for women too.

A quick fix when you are out

If you notice a hole while out, a small safety pin on the inside can hold the stitches together until you get home. Some use a drop of clear nail varnish on the edge, but it stiffens the fabric and is hard to remove. The pin is the gentlest option and leaves no trace.

Do not pull at the hole

It is tempting to pick at a hole to see how big it is. But each tug at the edge loosens more stitches. Touch it as little as possible until you have needle and thread ready. Avoid washing the garment before the hole is closed, as the machine pulls the fabric and can double a small hole.

Small holes are easy, large ones hard

A hole the size of a pinhead can be closed with three stitches. One the size of a coin needs a darn or a patch, and the result is stiffer and more visible. The difference in effort is big, and often it comes down to how fast you reacted. That is the best reason to act at once.

Check your clothes regularly

The easiest way to catch holes early is to look when clothes come out of the wash. Hold them up to the light and thin spots and small holes show clearly. Put anything that needs mending in its own pile so it is not worn first. It takes a moment and keeps clothes in use much longer.