Sometimes yes, but not always. Endometriosis can be suspected clinically (based on symptoms) or diagnosed surgically (by observation and histology). Whilst medical (e.g. the combined pill, or Goserelin) and surgical treatments exist, endometriosis can grow back under the influence of oestrogen. Suppressive treatment (e.g. the pill and other progesterone medications) are effective and essential in reducing the recurrence of endometriosis. Repeat surgeries are not always beneficial and may be harmful in the setting of endometriosis.