A menstrual period typically lasts between three to seven days. A period that lasts longer than seven days is considered a long period, and may be referred to as menorrhagia. However, periods on the longer end of normal (five to seven days) aren’t something to worry about. A period may take longer than usual to stop due to the use of birth control and some health conditions, including endometriosis. ^{healthline.com}+2 ^{1 3 2}