The procedure usually takes 30 to 45 minutes. If endometriosis or scar tissue needs to be removed, your surgeon will use one of various techniques, including cutting and removing tissue (excision) or destroying it with a laser beam or electric current (electrocautery).s with hormone therapy, surgery relieves endometriosis pain for most women. But it does not guarantee long-lasting results. Some studies have shown: 1  Most women-about 60 to 80 out of 100-report pain relief in the first months after surgery. 2  More than 50 out of 100 women have symptoms return within 2 years after surgery.