It’s been a month after my wife's normal delivery but the bleeding has still not stopped. What could be the problem?

For some women, lochia may last for 6 to 8 weeks after delivery. If your wife is bleeding profusely, or if the lochia is bright red or has a foul smell, bring her to the doctor. http://sg.theasianparent.com/lochia_postpartum_bleeding_singapore/