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What Causes Hair Loss: Head Injuries and Becoming Pregnant

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Permanent hair loss can be a direct result of a severe physical injury to your scalp. Although in some cases the hair might grow back, the majority of head trauma victims will have a total and permanent loss of hair. Some possible head trauma examples would be chemical burns from acid or other highly flammable substances, severe cutting and damage from a blunt object, and over-exposure to cold temperatures such as freezing from liquid nitrogen or from frostbite.

Sometimes physical damage that causes hair loss may not come in the form of a severe injury. For example, if you wear a tight fitting helmet that causes continuous pressure, this can lead to permanent hair loss as well.

Surgical operations that went wrong can cause permanent hair loss, such as cosmetic surgeries like scalp reduction or a face lift. They may even have suffered from an incorrect hair replacement surgery as well.

Some women experience a temporary loss of hair just days after giving birth. What happens here is that during the 2nd and 3rd trimester, the hair follicles that a woman has stays in the "growing phase" longer than it should have. So instead of the hair going through the normal regeneration cycle and shedding like it's supposed to, the hair follicles remain active and do not fall to the wayside which results in extremely thick hair.

Many women enjoy this burst of luxurious hair growth. But here is the bad news: this hair growth is not permanent. Within 10 to 12 weeks after the baby being born, mom's hair follicles will go back into their normal growth cycle. This means that all of this extra thick hair that should have been shedding for the last few months, will now begin to fall out at a rapid pace, and usually does so all at once. This condition is temporary too and is merely the result of a woman's body bouncing back to as it was before becoming pregnant. It's like they say: good thing never last.