Postpartum bleeding, also known as lochia, is a normal process after childbirth as the uterus sheds its lining. Typically, lochia lasts for 4-6 weeks, gradually decreasing in flow and changing in color from bright red to pinkish-brown and eventually to yellowish-white. While this timeframe is common, individual experiences may vary. It's crucial to consult a healthcare professional if you experience excessively heavy bleeding, large clots, fever, or a foul odor, as these symptoms may indicate complications.