There are a lot of factors that cause hair fall. Most of us normally shed 50 to 100 hairs a day. Excessive hair loss will cause trigger the thinning of scalp hair. The cause of hair lose may be because of these factors.
1. Family History (hereditary)
2. Hormonal Changes
3. Medical Conditions
There are a lot of medications available to cure it as well as natural remedies. Though this may be true i still highly recommend seeing an expert in order to understand the real situation.