No, you don’t have to change your towel every time some more blood comes. We recommend that you change your towel every four or five hours. On the days your flow is heaviest (usually the first two or three days), it can be a good idea to change a little more frequently. If you find that you need to change your towel more frequently than this, it’s a good idea to choose a more absorbent towel, because if can be a nuisance long-term if you have to keep running out to change. At night, we recommend that you use a night-time towel, so that you can feel secure and sleep well all night long. You don’t need to change a night towel until the morning.