Why a hole always appears at the big toe

Short answer: The nail and the pressure from the shoe hit the same spot every day. The combination of friction and a sharp nail wears through faster than anything else, which is why it almost always happens in the same place.

The nail is the sharp part

A short, even nail does not cut into the fabric, while a long or unevenly trimmed one rubs against the threads with every step. Trim nails straight across and file the edges smooth, so the sharp edge is not working against the sock hour after hour. See bamboo socks for men.

The front of the shoe presses at the same time

If the shoe is too short, the toe presses against the fabric with every step, and that pressure combined with the nail means the same spot gets loaded again and again. Check that there is roughly a thumb's width between the toe and the tip of the shoe when standing.

Reinforcement at the toe helps

Some socks have extra yarn exactly where the wear happens most. That extends the lifespan noticeably, because the thicker yarn withstands more repeated stress before the threads give way and a hole forms. See bamboo underwear for men.

Rotation spreads the wear

Several pairs in rotation mean fewer days per pair on the same spot, so each pair gets time to rest between uses instead of being worn daily on exactly the same point.

Fabric wears differently

Cotton tears through faster than a sock blended with synthetic yarn, because cotton fibres are shorter and more fragile under repeated friction. Bamboo viscose blended with a hardwearing yarn often lasts longer under this particular kind of stress. See bamboo clothing for men.

Sock style matters

A sock without a seam across the toes creates fewer pressure points than one with a visible seam, since the seam itself can become the spot where wear begins. Turn the sock inside out if the seam feels hard against the skin.

The age of the shoe plays a part

An old shoe with an unevenly worn sole distributes pressure differently than a new one, and that can shift the load toward the big toe specifically without you noticing it. Check the sole wear from time to time.

Washing does not always help

Hot washing and the tumble dryer make the yarn stiffer and less forgiving, which increases friction against the nail rather than reducing it. Wash at a low temperature and air dry the socks to keep the yarn soft for as long as possible. See bamboo socks for women.

When it is time for new socks

If the hole keeps returning on the same pair despite trimmed nails and the right shoe size, the sock has probably reached the end of its life, and a new pair solves the problem faster than repeated mending.