Disease

Other Causes of Hair Loss
If you are suffering from hair loss, it's imperative to talk with your dermatologist or trichologist to identify the cause of your hair loss. Together, depending on the extent and pattern of hair loss, you can workto find possible solutions. Sometimes, hair loss is genetic. Other times, it's related to a disease, disorder or a medication you are taking. Or, perhaps your hair loss is due to one of the other causes below.

Emotional or Physical Shock
After suffering an emotional shock, such as a death in the family or even going through a divorce, it's not uncommon to notice hair loss. The same holds true for a physical shock — anything from major surgery to aprolonged fever.
Once the stress caused by the shock is regulated, the good news is the hair loss should reverse itself. However, this process could take months or in some cases, even years.

Pregnancy
Pregnancy can cause hormones to get out of whack. Though many pregnant women experience shiny, healthy hair, at any time during pregnancy, women may suffer unexplained hair loss or thinning of hair. Additionally, it's quite common for hair loss to occur approximately three months after giving birth due to a sudden rise in hormones.
Women who suffer from hair loss during or after pregnancy, even if the hair loss is dramatic, usually can expect to regain a full head of hair within six to a year.

Low Testosterone
Both males and females can suffer from low testosterone. When it happens in adulthood, low testosterone can cause hair loss. Other symptoms of low testosterone include osteoporosis, decreased sexual desire, irritability and sleep disturbances.
Once low testosterone is diagnosed, testosterone replacement therapy can typically reverse all the symptoms — including hair loss.

Weight Gain or Weight Loss
Massive weight gain and obesity can lead to hair loss and a host of other health issues. Losing weight can help reduce the risk of heart attack and stroke, lower blood pressure and resolve a number of health concerns. Additionally, many people can attribute their longevity to maintaining a healthy weight, daily exercise and a healthy diet. Hair function, too, should be restored once a healthy weight is achieved and maintained.
However, it should be noted that quick weight loss can also lead to hair loss. If you've lost a lot of weight in a short amount of time, you may also notice your hair begin to thin or even fall out. But again, onceyour weight stabilizes, any hair issues should also be resolved.

Diet
Can hair loss be caused by what you eat? Definitely. If you don't eat enough of certain foods, such as foods rich in calcium, protein and iron, you may experience thinning hair and hair loss. Some researchers also believe that too much of certain vitamins and minerals can play a role in hair loss. For example, various studies point to an excess amount of vitamin A or vitamin D can cause hair loss and other hair-related issues.
To keep your hair its healthiest, eat well-balanced meals and consult with a professional before taking any vitamins or supplements.