First of all, it is important to determine the cause of your hair thinning. Is it because of your stress levels, lifestyle choices or medical conditions? The most common cause of hair thinning for both men and women is considered as a hereditary condition in which sex hormones cause hair to fall out in a particular pattern. While male or female pattern baldness is permanent, there are still some measures you can take to slow the process.
Your hair may grow back after thinning but only if the cause of the thinning is temporary and has been dealt with, such as alleviating stress to stop stress-related thinning, restoring your hormonal balance if the thinning was related to hormones or getting scalp psoriasis treated. If your hair is thinning due to genetics (hereditary hair loss or pattern hair loss) or a condition like alopecia, then the thinning is usually permanent.