Why is a case history form necessary?

Screening for certain medications can prevent possible bruising during electrolysis treatments. .http://www.hairroute.com/subscriber/pritchett/expert0305.html

Certain medical conditions can cause excess hair growth that must be treated by a physician prior to electrolysis such as Polycystic ovary syndrome (PCOS)
http://www.netdoctor.co.uk/womenshealth/facts/pcos.htm