The life line travels around the thumb. This tells us about the subject's physical health: the stronger the line the better the physical constitution. If the line looks weak and frayed then it could be a sign of delicate health. Again it is worth noting that we can't make a deduction from one line alone as other markings might compensate the weakness.

The line also tells us about particular events in the subject's life, especially big changes and the effects of other people.