Causes of hair fall

There are several conditions which cause hair fall. Some of the major causes are A prolonged illness.   Surgery.   Stress   Thyroid hormone imbalance.   Imbalance of male and female hormone.   Few Medicines like anticoagulants, medicines used for gout, chemotherapy for cancer, excess of vitamin A, birth control pills and antidepressants.   In conditions like lupus, diabetes etc

• Fungal infection of scalp.
   
• Hair styles which involve tying of hair tightly, usage of tight rollers, etc
   
• Use of harsh chemicals or hot oil for treatment
• source:http://www.ayurhelp.com/hair/hairloss.htm