This is normal and is not irreversible.

But, armed with a little information and better lifestyle choices, you can change your hair's length, thickness, volume, health, and lifespan. The follicle is where the hair grows from and, unlike much of the hair shaft, it is. Sometimes, the most subtle things can cause hair loss, including diet, medications, spikes in hormonal levels, stress, fungus, alcohol, smoking, worrying, and even synthetic treatments to the hair. While in reality the crisis may have been minimal, such as a bad hair cut, a horrible hair coloring treatment, or even an odorous product, the effect can be devastating. Every hair on your head has two parts, the hair follicle and the hair shaft. Yet, nothing is more devastating that to awaken to a slowly thinning head of hair, especially if you have been eating well, sleeping well, and even regularly conditioning and carefully styling your hair.

How to Stop Hair Thinning Before You Lose All Your Hair At some point or another we have also suffered from a dramatic hair crisis.