How to Prevent Hair Loss

Hair loss has multiple potential causes, including diet, mineral deficiency, medications, severe stress or illness, pollution, and your genetics. Up to one third of the population suffer from hair loss, and of that third, thousands are women. There are no guarantees that you can prevent hair loss that is genetically programmed, or hair loss caused by factors not within your control. However, you can do the best by your hair to give it the greatest chance of staying in top condition and not leaving your head sooner than it needs to.
Avoiding Damaging Your Hair.

Limit your use of hair dryers. Heat weakens hair proteins. Constant heating and drying can lead to brittleness and fragility that can cause hair loss that would not have occurred otherwise. Natural drying is best for you hair, so aim to dry it naturally more often than drying it with heat.

• Other devices that heat your hair, including hot curlers, hot brushes and hair straighteners, can also have this effect.
• If you do use heated tools be careful, because continually burnt scalps can permanently damage hair follicles. Avoid perms. Perming refers to either chemical straightening or chemical curling, both of which can damage your hair. It works specifically by breaking the inner bonds of your hair, and then reforming them in a different way to straighten or curl your hair. This weakens your hair, making it dull, dry and brittle. Over time dry and brittle hair can contribute to hair loss. 
• The medical name for loss of hair due to hairstyles that are too tight is known as "traction alopecia" and it is completely preventable as a cause in and of itself! Wash hair with mild shampoo. Hair washing help prevent hair loss as it can keep your hair and scalp clean (preventing the chances of infections that might cause hair loss). You should try not to wash your hair every day, since shampoo can strip hair of its natural oils — aim for every other day at the most. Provided you use a mild shampoo, clean hair will give the impression of more volume than dirty hair, which tends to sit flatter and more parted than clean hair.
• Don't bleach your hair. Bleaching your hair removes your natural pigment when the cuticles are penetrated by chemicals. By doing this you are changing the structure of your hair and making it more susceptible to damage. You are making it weaker, so bleaching coupled with blow drying and styling can really damage your hair.Don’t pull your hair too tight. Some hairstyles that require tight pulling and elastics or clips can be a cause of hair loss if done on a daily basis. For example, tight ponytails, tight braids, cornrows, and plaits can lead to significant hair loss when done daily.Winding hair tightly onto rollers, especially heated rollers, is also liable to cause more hair loss.