The mucus plug is a thick, jelly-like barrier that seals the cervix during pregnancy, while normal discharge (leukorrhea) is thin, milky, and ongoing throughout pregnancy. The mucus plug is usually clear, pink, or slightly blood-tinged (“bloody show”), sticky or clumpy, and often comes out toward the end of pregnancy (around 37 weeks or later), sometimes all at once or in pieces; its release means the cervix is starting to open, but labor may still be hours to days (or even longer) away. In contrast, normal discharge is lighter, odorless, and doesn’t signal labor. You should contact a doctor if you notice heavy bleeding, foul smell, green/yellow discharge, severe itching, sudden gush of fluid (possible water breaking), or if the mucus plug comes out very early (before 37 weeks), as these may indicate infection or preterm labor.