If we have to start from the technical point of view, then let me make one thing very clear that the normal cycle of hair growth generally lasts for about 2 to 6 years however there could again be exceptions and close differentiations is quite possible. There is a hair growth of roughly around 1 centimeter which is a little less than half an inch per month during this phase.

As a matter of fact there is almost about 8o to 90% of the hair that is growing on your scalp simultaneously. There is more like 15 to 10 percent of the hair at any point of time is going through the rest phase. And from about a time span of about 2 to 3 months, the rest hair dies, falls out and new hair is beginning to develop in its place.

Hence it is a normal phenomenon that people goes through of shedding the dead hair for the new one to come up. However the intensity of hair fall again depends on several factors. On the other hand there may be people that suffer excessive which would be termed as more than normal kind of hair loss. Most of the time, this is quite a common issue amongst the men, women and also children.

There could be a range of factors that may cause excessive hair loss.  A surgery, being on medication, excessive chemicals, using wrong products, outdated products are some of the major causes. Hair loss might also take place when a person is going through stress or a temporary illness.

There have also been reported issues of hormonal problems causing excessive hair loss. Moreover scientific studies also revealed the fact that just incase the thyroid gland is overactive or under active could also lead to a lot of hair falling or balling if the case seems serious than usual. Generally there are cases when the male or female hormones which are typically known as androgens and estrogens that are set out of balance. The best thing in such cases is to correct the hormone imbalance by taking doctor prescribed medicines which would to a considerable extent cease excessive hair falling.

At time there are high chances when a lot of women might take notice that they are suffering a lot of hair loss just about 3 to 4 months after delivery. This is so as it is again related to the hormones as at that time there is an extremely high level of certain hormones that by and large cause the body to keep hair that would usually fall out. But at the time when the hormones are back to its place that is the hormones are balanced the hair falls out less and then the normal cycle begins.