Hair loss may or may not be permanent. Temporary hair loss is definitely much easier to deal with and cure than the permanent one. A temporary hair loss is nearly always curable. The remedy, however, depends on the cause of it.
There are several factors responsible for this kind of hair loss. It may have been caused due to illness, in which case the hair come back once the illness is fully cured.
Poor nutrition is another cause. You may be taking a diet that is otherwise fulfilling but may still not be nutritious enough for your hair. So, take a good account of what you are eating and how nutritious it is. You may also visit a dermatologist, who'll surely be able to help you in making a suitable diet chart.
Some medicines also cause hair loss. If you are on medication and feel that you hair loss started after you began taking the prescribed medicines, there is a good chance that they may be the cause of your hair loss. In such a case you need not worry much. Your doctor will be able to tell you if the medicines he prescribed have any side effects that result in hair loss. In most of the cases, once the medication is over, hair loss also stops. Certain medical treatments like Chemotherapy also cause temporary hair loss.
If you have recently suffered from high fever, flu or have undergone surgery, you may also experience temporary hair loss. After the childbirth women lose hair rapidly. Though there is nothing to worry about, because the hair loss is because of hormonal imbalance. This is because during pregnancy a female body produces certain hormones in excess which results in a thicker growth of hair. After the child birth the hormone levels come to normal causing the hair loss. It is perfectly normal and absolutely natural.
Medical studies have shown that hair loss is seen in those who are diabetic or suffer from lupus and thyroid disorders. This kind of hair loss is attributable to the effects of the ailment and poor absorption of the required nutrition by a sick body. Often the hair re-grow automatically once the patient recovers fully.