When people go through stressful times, their hair might start to grey — and when stress goes down, some might actually see their hair regain color. This has been noticed to happen around the same time as changes in stress levels.

Stress might turn your hair gray, but if you reduce that stress, your hair could actually regain its color again.

Stress might be turning your hair gray by messing with your cells, and relaxing could help your hair get its color back.

Your hair color comes from cells in your hair roots, and as you age, those cells slow down — that's why hair turns gray. But new research says things like stress might also play a role.

Sometimes, multiple hairs on the same person's head go grey or even regain color at the same time — this might mean the body's internal systems are controlling hair color changes together.

Stress can turn your hair gray by messing with nerve signals in your hair follicles, which damages the cells that give hair its color — and once they're gone, the graying is permanent.